231063861 has 48 divisors (see below), whose sum is σ = 368375040. Its totient is φ = 128419200.

The previous prime is 231063839. The next prime is 231063871. The reversal of 231063861 is 168360132.

231063861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231063861 - 2⁵ = 231063829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231063821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1172815 + ... + 1173011.

It is an arithmetic number, because the mean of its divisors is an integer number (7674480).

Almost surely, 2^231063861 is an apocalyptic number.

231063861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231063861 is a deficient number, since it is larger than the sum of its proper divisors (137311179).

231063861 is a wasteful number, since it uses less digits than its factorization.

231063861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 231063861 is about 15200.7848810514. The cubic root of 231063861 is about 613.6357810135.

The spelling of 231063861 in words is "two hundred thirty-one million, sixty-three thousand, eight hundred sixty-one".