215920029424 has 80 divisors (see below), whose sum is σ = 475832401920. Its totient is φ = 94014708480.

The previous prime is 215920029331. The next prime is 215920029443. The reversal of 215920029424 is 424920029512.

It is a happy number.

215920029424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215920029424² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481657 + ... + 814759.

It is an arithmetic number, because the mean of its divisors is an integer number (5947905024).

Almost surely, 2^215920029424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215920029424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237916200960).

215920029424 is an abundant number, since it is smaller than the sum of its proper divisors (259912372496).

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

215920029424 is a wasteful number, since it uses less digits than its factorization.

215920029424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333278 (or 333272 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 215920029424 in words is "two hundred fifteen billion, nine hundred twenty million, twenty-nine thousand, four hundred twenty-four".