90515111 has 4 divisors (see below), whose sum is σ = 90711072. Its totient is φ = 90319152.

The previous prime is 90515099. The next prime is 90515153. The reversal of 90515111 is 11151509.

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-90515111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90515171) 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, 97286 + ... + 98211.

It is an arithmetic number, because the mean of its divisors is an integer number (22677768).

Almost surely, 2^90515111 is an apocalyptic number.

90515111 is a deficient number, since it is larger than the sum of its proper divisors (195961).

90515111 is a wasteful number, since it uses less digits than its factorization.

90515111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195960.

The product of its (nonzero) digits is 225, while the sum is 23.

The square root of 90515111 is about 9513.9429785973. The cubic root of 90515111 is about 448.9938193900.

The spelling of 90515111 in words is "ninety million, five hundred fifteen thousand, one hundred eleven".