161310232 has 32 divisors (see below), whose sum is σ = 311493600. Its totient is φ = 78257664.

The previous prime is 161310223. The next prime is 161310241. The reversal of 161310232 is 232013161.

It is an interprime number because it is at equal distance from previous prime (161310223) and next prime (161310241).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175069 + ... + 175987.

It is an arithmetic number, because the mean of its divisors is an integer number (9734175).

Almost surely, 2^161310232 is an apocalyptic number.

It is an amenable number.

161310232 is a deficient number, since it is larger than the sum of its proper divisors (150183368).

161310232 is a wasteful number, since it uses less digits than its factorization.

161310232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 161310232 is about 12700.7965104556. The cubic root of 161310232 is about 544.3613786118.

Adding to 161310232 its reverse (232013161), we get a palindrome (393323393).

The spelling of 161310232 in words is "one hundred sixty-one million, three hundred ten thousand, two hundred thirty-two".