231972938 has 32 divisors (see below), whose sum is σ = 380436480. Its totient is φ = 105678000.

The previous prime is 231972931. The next prime is 231972959. The reversal of 231972938 is 839279132.

It is a happy number.

It is a super-2 number, since 2×231972938² = 107622887928703688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231972931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 224483 + ... + 225513.

It is an arithmetic number, because the mean of its divisors is an integer number (11888640).

Almost surely, 2^231972938 is an apocalyptic number.

231972938 is a deficient number, since it is larger than the sum of its proper divisors (148463542).

231972938 is a wasteful number, since it uses less digits than its factorization.

231972938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its digits is 163296, while the sum is 44.

The square root of 231972938 is about 15230.6578321489. The cubic root of 231972938 is about 614.4394725306.

It can be divided in two parts, 2319 and 72938, that added together give a palindrome (75257).

The spelling of 231972938 in words is "two hundred thirty-one million, nine hundred seventy-two thousand, nine hundred thirty-eight".