215622620243424 has 144 divisors (see below), whose sum is σ = 615538896676704. Its totient is φ = 71597361254400.

The previous prime is 215622620243399. The next prime is 215622620243473. The reversal of 215622620243424 is 424342026226512.

215622620243424 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 2 + 2 + 6 + 202 + 434 + 2 + 4 = 666.

215622620243424 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×215622620243424² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215622620243424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1839081444 + ... + 1839198684.

It is an arithmetic number, because the mean of its divisors is an integer number (4274575671366).

Almost surely, 2^{215622620243424} is an apocalyptic number.

215622620243424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215622620243424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307769448338352).

215622620243424 is an abundant number, since it is smaller than the sum of its proper divisors (399916276433280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215622620243424 is a wasteful number, since it uses less digits than its factorization.

215622620243424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141801 (or 141790 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 45.

Adding to 215622620243424 its reverse (424342026226512), we get a palindrome (639964646469936).

The spelling of 215622620243424 in words is "two hundred fifteen trillion, six hundred twenty-two billion, six hundred twenty million, two hundred forty-three thousand, four hundred twenty-four".