99647233231 has 24 divisors (see below), whose sum is σ = 126184502400. Its totient is φ = 77008198176.

The previous prime is 99647233219. The next prime is 99647233271. The reversal of 99647233231 is 13233274699.

It is not a de Polignac number, because 99647233231 - 2²⁹ = 99110362319 is a prime.

It is a super-2 number, since 2×99647233231² (a number of 23 digits) contains 22 as substring.

It is the 315670-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99647233211) by changing a digit.

It is a nontrivial repunit in base 315669.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928581 + ... + 1030318.

It is an arithmetic number, because the mean of its divisors is an integer number (5257687600).

Almost surely, 2^99647233231 is an apocalyptic number.

99647233231 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

99647233231 is a deficient number, since it is larger than the sum of its proper divisors (26537269169).

99647233231 is a wasteful number, since it uses less digits than its factorization.

99647233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958975 (or 1958962 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 49.

The spelling of 99647233231 in words is "ninety-nine billion, six hundred forty-seven million, two hundred thirty-three thousand, two hundred thirty-one".