161183472 has 40 divisors (see below), whose sum is σ = 423224400. Its totient is φ = 52846080.

The previous prime is 161183467. The next prime is 161183497. The reversal of 161183472 is 274381161.

It is a super-2 number, since 2×161183472² = 51960223291949568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24597 + ... + 30452.

It is an arithmetic number, because the mean of its divisors is an integer number (10580610).

Almost surely, 2^161183472 is an apocalyptic number.

161183472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161183472 is an abundant number, since it is smaller than the sum of its proper divisors (262040928).

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

161183472 is a wasteful number, since it uses less digits than its factorization.

161183472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55121 (or 55115 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 161183472 is about 12695.8052915126. The cubic root of 161183472 is about 544.2187521336.

The spelling of 161183472 in words is "one hundred sixty-one million, one hundred eighty-three thousand, four hundred seventy-two".