31131312199 has 16 divisors (see below), whose sum is σ = 35077597632. Its totient is φ = 27413388288.

The previous prime is 31131312193. The next prime is 31131312239. The reversal of 31131312199 is 99121313113.

It is not a de Polignac number, because 31131312199 - 2²³ = 31122923591 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 (31131312193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28042 + ... + 251095.

It is an arithmetic number, because the mean of its divisors is an integer number (2192349852).

Almost surely, 2^31131312199 is an apocalyptic number.

31131312199 is a deficient number, since it is larger than the sum of its proper divisors (3946285433).

31131312199 is a wasteful number, since it uses less digits than its factorization.

31131312199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279546.

The product of its digits is 4374, while the sum is 34.

The spelling of 31131312199 in words is "thirty-one billion, one hundred thirty-one million, three hundred twelve thousand, one hundred ninety-nine".