161592431 has 32 divisors (see below), whose sum is σ = 222878208. Its totient is φ = 113063040.

The previous prime is 161592413. The next prime is 161592433. The reversal of 161592431 is 134295161.

It is a cyclic number.

It is not a de Polignac number, because 161592431 - 2¹⁰ = 161591407 is a prime.

It is a super-2 number, since 2×161592431² = 52224227512979522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161592433) 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, 34856 + ... + 39218.

It is an arithmetic number, because the mean of its divisors is an integer number (6964944).

Almost surely, 2^161592431 is an apocalyptic number.

161592431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161592431 is a deficient number, since it is larger than the sum of its proper divisors (61285777).

161592431 is a wasteful number, since it uses less digits than its factorization.

161592431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431.

The product of its digits is 6480, while the sum is 32.

The square root of 161592431 is about 12711.9011560034. The cubic root of 161592431 is about 544.6786321857.

The spelling of 161592431 in words is "one hundred sixty-one million, five hundred ninety-two thousand, four hundred thirty-one".