99159021 has 24 divisors (see below), whose sum is σ = 156121056. Its totient is φ = 60279840.

The previous prime is 99159007. The next prime is 99159023. The reversal of 99159021 is 12095199.

It is not a de Polignac number, because 99159021 - 2¹³ = 99150829 is a prime.

It is a super-2 number, since 2×99159021² = 19665022891356882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99159023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4606 + ... + 14816.

It is an arithmetic number, because the mean of its divisors is an integer number (6505044).

Almost surely, 2^99159021 is an apocalyptic number.

It is an amenable number.

99159021 is a deficient number, since it is larger than the sum of its proper divisors (56962035).

99159021 is a wasteful number, since it uses less digits than its factorization.

99159021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10313 (or 10310 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 99159021 is about 9957.8622705880. The cubic root of 99159021 is about 462.8540591522.

The spelling of 99159021 in words is "ninety-nine million, one hundred fifty-nine thousand, twenty-one".