91431304124311 has 4 divisors (see below), whose sum is σ = 91431345636400. Its totient is φ = 91431262612224.

The previous prime is 91431304124233. The next prime is 91431304124327. The reversal of 91431304124311 is 11342140313419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91431304124311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91431304124911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17255466 + ... + 21922903.

It is an arithmetic number, because the mean of its divisors is an integer number (22857836409100).

Almost surely, 2^{91431304124311} is an apocalyptic number.

91431304124311 is a deficient number, since it is larger than the sum of its proper divisors (41512089).

91431304124311 is a wasteful number, since it uses less digits than its factorization.

91431304124311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41512088.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 91431304124311 in words is "ninety-one trillion, four hundred thirty-one billion, three hundred four million, one hundred twenty-four thousand, three hundred eleven".