13020561431 has 2 divisors, whose sum is σ = 13020561432. Its totient is φ = 13020561430.

The previous prime is 13020561413. The next prime is 13020561439. The reversal of 13020561431 is 13416502031.

Together with previous prime (13020561413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13020561431 - 2³⁰ = 11946819607 is a prime.

It is a super-2 number, since 2×13020561431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13020561431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13020561439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510280715 + 6510280716.

It is an arithmetic number, because the mean of its divisors is an integer number (6510280716).

Almost surely, 2^13020561431 is an apocalyptic number.

13020561431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13020561431 is an equidigital number, since it uses as much as digits as its factorization.

13020561431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 13020561431 in words is "thirteen billion, twenty million, five hundred sixty-one thousand, four hundred thirty-one".