172169056 has 24 divisors (see below), whose sum is σ = 350647920. Its totient is φ = 83115648.

The previous prime is 172168999. The next prime is 172169057. The reversal of 172169056 is 650961271.

It is a super-2 number, since 2×172169056² = 59284367687862272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172169057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91836 + ... + 93691.

It is an arithmetic number, because the mean of its divisors is an integer number (14610330).

Almost surely, 2^172169056 is an apocalyptic number.

172169056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172169056 is an abundant number, since it is smaller than the sum of its proper divisors (178478864).

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

172169056 is a wasteful number, since it uses less digits than its factorization.

172169056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185566 (or 185558 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 172169056 is about 13121.3206652379. The cubic root of 172169056 is about 556.3119206244.

The spelling of 172169056 in words is "one hundred seventy-two million, one hundred sixty-nine thousand, fifty-six".