13320251531 has 2 divisors, whose sum is σ = 13320251532. Its totient is φ = 13320251530.

The previous prime is 13320251509. The next prime is 13320251537. The reversal of 13320251531 is 13515202331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13320251531 - 2³⁰ = 12246509707 is a prime.

It is a super-2 number, since 2×13320251531² (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 13320251531.

It is not a weakly prime, because it can be changed into another prime (13320251537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660125765 + 6660125766.

It is an arithmetic number, because the mean of its divisors is an integer number (6660125766).

Almost surely, 2^13320251531 is an apocalyptic number.

13320251531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320251531 is an equidigital number, since it uses as much as digits as its factorization.

13320251531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13320251531 its reverse (13515202331), we get a palindrome (26835453862).

The spelling of 13320251531 in words is "thirteen billion, three hundred twenty million, two hundred fifty-one thousand, five hundred thirty-one".