90015081 has 8 divisors (see below), whose sum is σ = 129252480. Its totient is φ = 55393872.

The previous prime is 90015073. The next prime is 90015083. The reversal of 90015081 is 18051009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90015081 - 2³ = 90015073 is a prime.

It is a super-2 number, since 2×90015081² = 16205429614873122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90015083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154001 + ... + 1154078.

It is an arithmetic number, because the mean of its divisors is an integer number (16156560).

Almost surely, 2^90015081 is an apocalyptic number.

It is an amenable number.

90015081 is a deficient number, since it is larger than the sum of its proper divisors (39237399).

90015081 is a wasteful number, since it uses less digits than its factorization.

90015081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308095.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 90015081 is about 9487.6277857007. The cubic root of 90015081 is about 448.1655043929.

The spelling of 90015081 in words is "ninety million, fifteen thousand, eighty-one".