172561136 has 40 divisors (see below), whose sum is σ = 377319600. Its totient is φ = 75729920.

The previous prime is 172561117. The next prime is 172561141. The reversal of 172561136 is 631165271.

It is a super-2 number, since 2×172561136² = 59554691315220992, which 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11801 + ... + 22008.

It is an arithmetic number, because the mean of its divisors is an integer number (9432990).

Almost surely, 2^172561136 is an apocalyptic number.

172561136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172561136 is an abundant number, since it is smaller than the sum of its proper divisors (204758464).

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

172561136 is a wasteful number, since it uses less digits than its factorization.

172561136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33857 (or 33851 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 172561136 is about 13136.2527381289. The cubic root of 172561136 is about 556.7338962073.

The spelling of 172561136 in words is "one hundred seventy-two million, five hundred sixty-one thousand, one hundred thirty-six".