90513515 has 4 divisors (see below), whose sum is σ = 108616224. Its totient is φ = 72410808.

The previous prime is 90513497. The next prime is 90513517. The reversal of 90513515 is 51531509.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90513515 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90513517) 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, 9051347 + ... + 9051356.

It is an arithmetic number, because the mean of its divisors is an integer number (27154056).

Almost surely, 2^90513515 is an apocalyptic number.

90513515 is a deficient number, since it is larger than the sum of its proper divisors (18102709).

90513515 is a wasteful number, since it uses less digits than its factorization.

90513515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18102708.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 90513515 is about 9513.8591013321. The cubic root of 90513515 is about 448.9911804261.

The spelling of 90513515 in words is "ninety million, five hundred thirteen thousand, five hundred fifteen".