161285232 has 40 divisors (see below), whose sum is σ = 423722880. Its totient is φ = 52849600.

The previous prime is 161285227. The next prime is 161285237. The reversal of 161285232 is 232582161.

It is an interprime number because it is at equal distance from previous prime (161285227) and next prime (161285237).

It is a super-2 number, since 2×161285232² = 52025852122587648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161285232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161285237) 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 7 ways as a sum of consecutive naturals, for example, 25644 + ... + 31307.

It is an arithmetic number, because the mean of its divisors is an integer number (10593072).

Almost surely, 2^161285232 is an apocalyptic number.

161285232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161285232 is an abundant number, since it is smaller than the sum of its proper divisors (262437648).

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

161285232 is a wasteful number, since it uses less digits than its factorization.

161285232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57021 (or 57015 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 161285232 is about 12699.8122820772. The cubic root of 161285232 is about 544.3332552923. Note that the first 3 decimals are identical.

The spelling of 161285232 in words is "one hundred sixty-one million, two hundred eighty-five thousand, two hundred thirty-two".