91055415 has 32 divisors (see below), whose sum is σ = 159667200. Its totient is φ = 43944320.

The previous prime is 91055411. The next prime is 91055473. The reversal of 91055415 is 51455019.

It is not a de Polignac number, because 91055415 - 2² = 91055411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91055411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38281 + ... + 40589.

It is an arithmetic number, because the mean of its divisors is an integer number (4989600).

Almost surely, 2^91055415 is an apocalyptic number.

91055415 is a deficient number, since it is larger than the sum of its proper divisors (68611785).

91055415 is a wasteful number, since it uses less digits than its factorization.

91055415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 91055415 is about 9542.2961073318. The cubic root of 91055415 is about 449.8854276219.

The spelling of 91055415 in words is "ninety-one million, fifty-five thousand, four hundred fifteen".