13400405131 has 2 divisors, whose sum is σ = 13400405132. Its totient is φ = 13400405130.

The previous prime is 13400405129. The next prime is 13400405189. The reversal of 13400405131 is 13150400431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13400405131 - 2¹ = 13400405129 is a prime.

It is a super-2 number, since 2×13400405131² (a number of 21 digits) contains 22 as substring.

Together with 13400405129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13400405111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700202565 + 6700202566.

It is an arithmetic number, because the mean of its divisors is an integer number (6700202566).

Almost surely, 2^13400405131 is an apocalyptic number.

13400405131 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400405131 is an equidigital number, since it uses as much as digits as its factorization.

13400405131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 13400405131 its reverse (13150400431), we get a palindrome (26550805562).

The spelling of 13400405131 in words is "thirteen billion, four hundred million, four hundred five thousand, one hundred thirty-one".