215552161711172 has 96 divisors (see below), whose sum is σ = 446669212631040. Its totient is φ = 89726003579520.

The previous prime is 215552161711147. The next prime is 215552161711177. The reversal of 215552161711172 is 271117161255512.

It is a super-2 number, since 2×215552161711172² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215552161711177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3451067279 + ... + 3451129737.

It is an arithmetic number, because the mean of its divisors is an integer number (4652804298240).

Almost surely, 2^{215552161711172} is an apocalyptic number.

215552161711172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215552161711172 is an abundant number, since it is smaller than the sum of its proper divisors (231117050919868).

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

215552161711172 is a wasteful number, since it uses less digits than its factorization.

215552161711172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110121 (or 110119 counting only the distinct ones).

The product of its digits is 294000, while the sum is 47.

The spelling of 215552161711172 in words is "two hundred fifteen trillion, five hundred fifty-two billion, one hundred sixty-one million, seven hundred eleven thousand, one hundred seventy-two".