99815130 has 24 divisors (see below), whose sum is σ = 259519572. Its totient is φ = 26617344.

The previous prime is 99815123. The next prime is 99815141. The reversal of 99815130 is 3151899.

99815130 = 4466² + 4467² + ... + 4470².

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 97002801 + 2812329 = 9849^2 + 1677^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554439 + ... + 554618.

Almost surely, 2^99815130 is an apocalyptic number.

99815130 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99815130 is an abundant number, since it is smaller than the sum of its proper divisors (159704442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99815130 is a wasteful number, since it uses less digits than its factorization.

99815130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109070 (or 1109067 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 99815130 is about 9990.7522239319. The cubic root of 99815130 is about 463.8726767428.

The spelling of 99815130 in words is "ninety-nine million, eight hundred fifteen thousand, one hundred thirty".