99155231 has 12 divisors (see below), whose sum is σ = 118465872. Its totient is φ = 81291936.

The previous prime is 99155171. The next prime is 99155249. The reversal of 99155231 is 13255199.

It is not a de Polignac number, because 99155231 - 2²² = 94960927 is a prime.

It is a super-2 number, since 2×99155231² = 19663519669326722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99155191 and 99155200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99155431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9686 + ... + 17091.

It is an arithmetic number, because the mean of its divisors is an integer number (9872156).

Almost surely, 2^99155231 is an apocalyptic number.

99155231 is a deficient number, since it is larger than the sum of its proper divisors (19310641).

99155231 is a wasteful number, since it uses less digits than its factorization.

99155231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26830 (or 26807 counting only the distinct ones).

The product of its digits is 12150, while the sum is 35.

The square root of 99155231 is about 9957.6719668806. The cubic root of 99155231 is about 462.8481620950.

The spelling of 99155231 in words is "ninety-nine million, one hundred fifty-five thousand, two hundred thirty-one".