231991683 has 16 divisors (see below), whose sum is σ = 385648896. Its totient is φ = 120515040.

The previous prime is 231991679. The next prime is 231991687. The reversal of 231991683 is 386199132.

It is an interprime number because it is at equal distance from previous prime (231991679) and next prime (231991687).

It is not a de Polignac number, because 231991683 - 2² = 231991679 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231991687) 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, 501916 + ... + 502377.

It is an arithmetic number, because the mean of its divisors is an integer number (24103056).

Almost surely, 2^231991683 is an apocalyptic number.

231991683 is a deficient number, since it is larger than the sum of its proper divisors (153657213).

231991683 is a wasteful number, since it uses less digits than its factorization.

231991683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004314.

The product of its digits is 69984, while the sum is 42.

The square root of 231991683 is about 15231.2731903804. The cubic root of 231991683 is about 614.4560223888.

The spelling of 231991683 in words is "two hundred thirty-one million, nine hundred ninety-one thousand, six hundred eighty-three".