99881085 has 16 divisors (see below), whose sum is σ = 160617600. Its totient is φ = 53000640.

The previous prime is 99881077. The next prime is 99881087. The reversal of 99881085 is 58018899.

It is not a de Polignac number, because 99881085 - 2³ = 99881077 is a prime.

It is a super-2 number, since 2×99881085² = 19952462281554450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99881087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13746 + ... + 19715.

It is an arithmetic number, because the mean of its divisors is an integer number (10038600).

Almost surely, 2^99881085 is an apocalyptic number.

It is an amenable number.

99881085 is a deficient number, since it is larger than the sum of its proper divisors (60736515).

99881085 is a wasteful number, since it uses less digits than its factorization.

99881085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33668.

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 99881085 is about 9994.0524813511. The cubic root of 99881085 is about 463.9748255392.

The spelling of 99881085 in words is "ninety-nine million, eight hundred eighty-one thousand, eighty-five".