99415431 has 24 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 66069432.

The previous prime is 99415423. The next prime is 99415457. The reversal of 99415431 is 13451499.

It is a happy number.

It is not a de Polignac number, because 99415431 - 2³ = 99415423 is a prime.

It is a super-2 number, since 2×99415431² = 19766855841831522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99415231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145216 + ... + 145898.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^99415431 is an apocalyptic number.

99415431 is a deficient number, since it is larger than the sum of its proper divisors (49970169).

99415431 is an equidigital number, since it uses as much as digits as its factorization.

99415431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1285 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 99415431 is about 9970.7287095779. The cubic root of 99415431 is about 463.2526722700.

The spelling of 99415431 in words is "ninety-nine million, four hundred fifteen thousand, four hundred thirty-one".