99231951 has 32 divisors (see below), whose sum is σ = 164469760. Its totient is φ = 51819264.

The previous prime is 99231929. The next prime is 99232031. The reversal of 99231951 is 15913299.

It is not a de Polignac number, because 99231951 - 2⁵ = 99231919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99231911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26355 + ... + 29883.

It is an arithmetic number, because the mean of its divisors is an integer number (5139680).

Almost surely, 2^99231951 is an apocalyptic number.

99231951 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

99231951 is a deficient number, since it is larger than the sum of its proper divisors (65237809).

99231951 is a wasteful number, since it uses less digits than its factorization.

99231951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655.

The product of its digits is 21870, while the sum is 39.

The square root of 99231951 is about 9961.5235280553. The cubic root of 99231951 is about 462.9675054593.

The spelling of 99231951 in words is "ninety-nine million, two hundred thirty-one thousand, nine hundred fifty-one".