91310531513 has 8 divisors (see below), whose sum is σ = 92125127328. Its totient is φ = 90496050624.

The previous prime is 91310531483. The next prime is 91310531539. The reversal of 91310531513 is 31513501319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91310531513 - 2²⁶ = 91243422649 is a prime.

It is a super-2 number, since 2×91310531513² (a number of 23 digits) contains 22 as substring.

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 91310531513.

It is not an unprimeable number, because it can be changed into a prime (91310531413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2798270 + ... + 2830712.

It is an arithmetic number, because the mean of its divisors is an integer number (11515640916).

Almost surely, 2^91310531513 is an apocalyptic number.

It is an amenable number.

91310531513 is a deficient number, since it is larger than the sum of its proper divisors (814595815).

91310531513 is a wasteful number, since it uses less digits than its factorization.

91310531513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57463.

The product of its (nonzero) digits is 6075, while the sum is 32.

The spelling of 91310531513 in words is "ninety-one billion, three hundred ten million, five hundred thirty-one thousand, five hundred thirteen".