161351232 has 112 divisors (see below), whose sum is σ = 490801152. Its totient is φ = 45826560.

The previous prime is 161351213. The next prime is 161351269. The reversal of 161351232 is 232153161.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364003 + ... + 364445.

Almost surely, 2^161351232 is an apocalyptic number.

161351232 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 161351232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245400576).

161351232 is an abundant number, since it is smaller than the sum of its proper divisors (329449920).

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

161351232 is a wasteful number, since it uses less digits than its factorization.

161351232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 726 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 161351232 is about 12702.4104799050. The cubic root of 161351232 is about 544.4074945661.

The spelling of 161351232 in words is "one hundred sixty-one million, three hundred fifty-one thousand, two hundred thirty-two".