31440012401131 has 2 divisors, whose sum is σ = 31440012401132. Its totient is φ = 31440012401130.

The previous prime is 31440012401123. The next prime is 31440012401141. The reversal of 31440012401131 is 13110421004413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31440012401131 - 2³ = 31440012401123 is a prime.

It is a super-2 number, since 2×31440012401131² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31440012401096 and 31440012401105.

It is not a weakly prime, because it can be changed into another prime (31440012401141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720006200565 + 15720006200566.

It is an arithmetic number, because the mean of its divisors is an integer number (15720006200566).

Almost surely, 2^{31440012401131} is an apocalyptic number.

31440012401131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440012401131 is an equidigital number, since it uses as much as digits as its factorization.

31440012401131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 31440012401131 its reverse (13110421004413), we get a palindrome (44550433405544).

The spelling of 31440012401131 in words is "thirty-one trillion, four hundred forty billion, twelve million, four hundred one thousand, one hundred thirty-one".