90161515 has 8 divisors (see below), whose sum is σ = 109563840. Its totient is φ = 71215872.

The previous prime is 90161509. The next prime is 90161521. The reversal of 90161515 is 51516109.

It is an interprime number because it is at equal distance from previous prime (90161509) and next prime (90161521).

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

It is a cyclic number.

It is not a de Polignac number, because 90161515 - 2⁵ = 90161483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113734 + ... + 114523.

It is an arithmetic number, because the mean of its divisors is an integer number (13695480).

Almost surely, 2^90161515 is an apocalyptic number.

90161515 is a deficient number, since it is larger than the sum of its proper divisors (19402325).

90161515 is a wasteful number, since it uses less digits than its factorization.

90161515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228341.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 90161515 is about 9495.3417526701. The cubic root of 90161515 is about 448.4083937411.

The spelling of 90161515 in words is "ninety million, one hundred sixty-one thousand, five hundred fifteen".