231972361 has 16 divisors (see below), whose sum is σ = 253497600. Its totient is φ = 211431168.

The previous prime is 231972337. The next prime is 231972371. The reversal of 231972361 is 163279132.

It is a cyclic number.

It is not a de Polignac number, because 231972361 - 2⁷ = 231972233 is a prime.

It is a super-2 number, since 2×231972361² = 107622352535828642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231972371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69550 + ... + 72808.

It is an arithmetic number, because the mean of its divisors is an integer number (15843600).

Almost surely, 2^231972361 is an apocalyptic number.

It is an amenable number.

231972361 is a deficient number, since it is larger than the sum of its proper divisors (21525239).

231972361 is a wasteful number, since it uses less digits than its factorization.

231972361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408.

The product of its digits is 13608, while the sum is 34.

The square root of 231972361 is about 15230.6388900794. The cubic root of 231972361 is about 614.4389630863.

The spelling of 231972361 in words is "two hundred thirty-one million, nine hundred seventy-two thousand, three hundred sixty-one".