13015404431 has 2 divisors, whose sum is σ = 13015404432. Its totient is φ = 13015404430.

The previous prime is 13015404371. The next prime is 13015404433. The reversal of 13015404431 is 13440451031.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13015404431 - 2¹⁰ = 13015403407 is a prime.

It is a super-2 number, since 2×13015404431² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 13015404433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13015404431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13015404433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6507702215 + 6507702216.

It is an arithmetic number, because the mean of its divisors is an integer number (6507702216).

Almost surely, 2^13015404431 is an apocalyptic number.

13015404431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13015404431 is an equidigital number, since it uses as much as digits as its factorization.

13015404431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 13015404431 its reverse (13440451031), we get a palindrome (26455855462).

The spelling of 13015404431 in words is "thirteen billion, fifteen million, four hundred four thousand, four hundred thirty-one".