31011432131 has 2 divisors, whose sum is σ = 31011432132. Its totient is φ = 31011432130.

The previous prime is 31011432119. The next prime is 31011432143. The reversal of 31011432131 is 13123411013.

It is a balanced prime because it is at equal distance from previous prime (31011432119) and next prime (31011432143).

It is an emirp because it is prime and its reverse (13123411013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31011432131 - 2²² = 31007237827 is a prime.

It is a super-2 number, since 2×31011432131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31011732131) by changing a digit.

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 as a sum of consecutive naturals, namely, 15505716065 + 15505716066.

It is an arithmetic number, because the mean of its divisors is an integer number (15505716066).

Almost surely, 2^31011432131 is an apocalyptic number.

31011432131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011432131 is an equidigital number, since it uses as much as digits as its factorization.

31011432131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31011432131 its reverse (13123411013), we get a palindrome (44134843144).

The spelling of 31011432131 in words is "thirty-one billion, eleven million, four hundred thirty-two thousand, one hundred thirty-one".