215155066442 has 8 divisors (see below), whose sum is σ = 322955024832. Its totient is φ = 107503391500.

The previous prime is 215155066417. The next prime is 215155066459. The reversal of 215155066442 is 244660551512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×215155066442² (a number of 23 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 215155066442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37067234 + ... + 37073037.

It is an arithmetic number, because the mean of its divisors is an integer number (40369378104).

Almost surely, 2^215155066442 is an apocalyptic number.

215155066442 is a deficient number, since it is larger than the sum of its proper divisors (107799958390).

215155066442 is a wasteful number, since it uses less digits than its factorization.

215155066442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74141724.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 215155066442 in words is "two hundred fifteen billion, one hundred fifty-five million, sixty-six thousand, four hundred forty-two".