161731344 has 40 divisors (see below), whose sum is σ = 439798240. Its totient is φ = 51072768.

The previous prime is 161731327. The next prime is 161731357. The reversal of 161731344 is 443137161.

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, 87757 + ... + 89580.

It is an arithmetic number, because the mean of its divisors is an integer number (10994956).

Almost surely, 2^161731344 is an apocalyptic number.

It is an amenable number.

161731344 is an abundant number, since it is smaller than the sum of its proper divisors (278066896).

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

161731344 is a wasteful number, since it uses less digits than its factorization.

161731344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177367 (or 177361 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 161731344 is about 12717.3638777854. The cubic root of 161731344 is about 544.8346652199.

The spelling of 161731344 in words is "one hundred sixty-one million, seven hundred thirty-one thousand, three hundred forty-four".