161307732 has 24 divisors (see below), whose sum is σ = 376600000. Its totient is φ = 53738496.

The previous prime is 161307721. The next prime is 161307791. The reversal of 161307732 is 237703161.

161307732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161307732.

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, 29769 + ... + 34767.

Almost surely, 2^161307732 is an apocalyptic number.

161307732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161307732 is an abundant number, since it is smaller than the sum of its proper divisors (215292268).

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

161307732 is a wasteful number, since it uses less digits than its factorization.

161307732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695 (or 7693 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 161307732 is about 12700.6980910500. The cubic root of 161307732 is about 544.3585664106.

The spelling of 161307732 in words is "one hundred sixty-one million, three hundred seven thousand, seven hundred thirty-two".