231623986 has 16 divisors (see below), whose sum is σ = 392091840. Its totient is φ = 101652880.

The previous prime is 231623983. The next prime is 231623989. The reversal of 231623986 is 689326132.

It is an interprime number because it is at equal distance from previous prime (231623983) and next prime (231623989).

It is not an unprimeable number, because it can be changed into a prime (231623983) 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, 180886 + ... + 182161.

It is an arithmetic number, because the mean of its divisors is an integer number (24505740).

Almost surely, 2^231623986 is an apocalyptic number.

231623986 is a deficient number, since it is larger than the sum of its proper divisors (160467854).

231623986 is a wasteful number, since it uses less digits than its factorization.

231623986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363089.

The product of its digits is 93312, while the sum is 40.

The square root of 231623986 is about 15219.1979420730. The cubic root of 231623986 is about 614.1312217990.

The spelling of 231623986 in words is "two hundred thirty-one million, six hundred twenty-three thousand, nine hundred eighty-six".