231956361 has 48 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 120597120.

The previous prime is 231956323. The next prime is 231956369. The reversal of 231956361 is 163659132.

231956361 is a `hidden beast` number, since 2 + 3 + 19 + 5 + 636 + 1 = 666.

It is not a de Polignac number, because 231956361 - 2¹⁹ = 231432073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231956369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56155 + ... + 60143.

It is an arithmetic number, because the mean of its divisors is an integer number (8714160).

Almost surely, 2^231956361 is an apocalyptic number.

231956361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231956361 is a deficient number, since it is larger than the sum of its proper divisors (186323319).

231956361 is a wasteful number, since it uses less digits than its factorization.

231956361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086 (or 4083 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 231956361 is about 15230.1136240016. The cubic root of 231956361 is about 614.4248360449.

The spelling of 231956361 in words is "two hundred thirty-one million, nine hundred fifty-six thousand, three hundred sixty-one".