99157881 has 4 divisors (see below), whose sum is σ = 132210512. Its totient is φ = 66105252.

The previous prime is 99157831. The next prime is 99157897. The reversal of 99157881 is 18875199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 99157881 - 2¹⁰ = 99156857 is a prime.

It is a super-2 number, since 2×99157881² = 19664570728820322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99157881.

It is not an unprimeable number, because it can be changed into a prime (99157811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16526311 + ... + 16526316.

It is an arithmetic number, because the mean of its divisors is an integer number (33052628).

Almost surely, 2^99157881 is an apocalyptic number.

It is an amenable number.

99157881 is a deficient number, since it is larger than the sum of its proper divisors (33052631).

99157881 is a wasteful number, since it uses less digits than its factorization.

99157881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33052630.

The product of its digits is 181440, while the sum is 48.

The square root of 99157881 is about 9957.8050292221. The cubic root of 99157881 is about 462.8522853830.

The spelling of 99157881 in words is "ninety-nine million, one hundred fifty-seven thousand, eight hundred eighty-one".