91512955 has 16 divisors (see below), whose sum is σ = 118018080. Its totient is φ = 67871232.

The previous prime is 91512947. The next prime is 91512959. The reversal of 91512955 is 55921519.

It is a cyclic number.

It is not a de Polignac number, because 91512955 - 2³ = 91512947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91512959) 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, 2340 + ... + 13729.

It is an arithmetic number, because the mean of its divisors is an integer number (7376130).

Almost surely, 2^91512955 is an apocalyptic number.

91512955 is a deficient number, since it is larger than the sum of its proper divisors (26505125).

91512955 is a wasteful number, since it uses less digits than its factorization.

91512955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16158.

The product of its digits is 20250, while the sum is 37.

The square root of 91512955 is about 9566.2403795849. The cubic root of 91512955 is about 450.6377049209.

The spelling of 91512955 in words is "ninety-one million, five hundred twelve thousand, nine hundred fifty-five".