161087232 has 72 divisors (see below), whose sum is σ = 430670800. Its totient is φ = 53452800.

The previous prime is 161087231. The next prime is 161087243. The reversal of 161087232 is 232780161.

161087232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 161087232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161087231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267732 + ... + 268332.

Almost surely, 2^161087232 is an apocalyptic number.

161087232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161087232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215335400).

161087232 is an abundant number, since it is smaller than the sum of its proper divisors (269583568).

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

161087232 is an equidigital number, since it uses as much as digits as its factorization.

161087232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 161087232 is about 12692.0144973129. The cubic root of 161087232 is about 544.1104158803.

The spelling of 161087232 in words is "one hundred sixty-one million, eighty-seven thousand, two hundred thirty-two".