91320315 has 16 divisors (see below), whose sum is σ = 147533568. Its totient is φ = 48230496.

The previous prime is 91320301. The next prime is 91320323. The reversal of 91320315 is 51302319.

It is a happy number.

It is not a de Polignac number, because 91320315 - 2²³ = 82931707 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28009 + ... + 31098.

It is an arithmetic number, because the mean of its divisors is an integer number (9220848).

Almost surely, 2^91320315 is an apocalyptic number.

91320315 is a deficient number, since it is larger than the sum of its proper divisors (56213253).

91320315 is a wasteful number, since it uses less digits than its factorization.

91320315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59218.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 91320315 is about 9556.1663338391. The cubic root of 91320315 is about 450.3212767433.

The spelling of 91320315 in words is "ninety-one million, three hundred twenty thousand, three hundred fifteen".