90915055 has 16 divisors (see below), whose sum is σ = 136018944. Its totient is φ = 56674080.

The previous prime is 90915053. The next prime is 90915059. The reversal of 90915055 is 55051909.

It is not a de Polignac number, because 90915055 - 2¹ = 90915053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90915055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90915053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117687 + ... + 118456.

It is an arithmetic number, because the mean of its divisors is an integer number (8501184).

Almost surely, 2^90915055 is an apocalyptic number.

90915055 is a deficient number, since it is larger than the sum of its proper divisors (45103889).

90915055 is a wasteful number, since it uses less digits than its factorization.

90915055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236166.

The product of its (nonzero) digits is 10125, while the sum is 34.

The square root of 90915055 is about 9534.9386468923. The cubic root of 90915055 is about 449.6541457793.

The spelling of 90915055 in words is "ninety million, nine hundred fifteen thousand, fifty-five".