31130232113 has 2 divisors, whose sum is σ = 31130232114. Its totient is φ = 31130232112.

The previous prime is 31130232103. The next prime is 31130232131. The reversal of 31130232113 is 31123203113.

Together with next prime (31130232131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25673011984 + 5457220129 = 160228^2 + 73873^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130232113 - 2²⁸ = 30861796657 is a prime.

It is not a weakly prime, because it can be changed into another prime (31130232103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565116056 + 15565116057.

It is an arithmetic number, because the mean of its divisors is an integer number (15565116057).

Almost surely, 2^31130232113 is an apocalyptic number.

It is an amenable number.

31130232113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130232113 is an equidigital number, since it uses as much as digits as its factorization.

31130232113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31130232113 its reverse (31123203113), we get a palindrome (62253435226).

The spelling of 31130232113 in words is "thirty-one billion, one hundred thirty million, two hundred thirty-two thousand, one hundred thirteen".