231923681 has 8 divisors (see below), whose sum is σ = 253175328. Its totient is φ = 210700000.

The previous prime is 231923669. The next prime is 231923687. The reversal of 231923681 is 186329132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231923681 - 2¹⁸ = 231661537 is a prime.

It is a super-2 number, since 2×231923681² = 107577187617179522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231923687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12806 + ... + 25056.

It is an arithmetic number, because the mean of its divisors is an integer number (31646916).

Almost surely, 2^231923681 is an apocalyptic number.

It is an amenable number.

231923681 is a deficient number, since it is larger than the sum of its proper divisors (21251647).

231923681 is a wasteful number, since it uses less digits than its factorization.

231923681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983.

The product of its digits is 15552, while the sum is 35.

The square root of 231923681 is about 15229.0407117454. The cubic root of 231923681 is about 614.3959795442.

The spelling of 231923681 in words is "two hundred thirty-one million, nine hundred twenty-three thousand, six hundred eighty-one".