13215631337 has 2 divisors, whose sum is σ = 13215631338. Its totient is φ = 13215631336.

The previous prime is 13215631333. The next prime is 13215631349. The reversal of 13215631337 is 73313651231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12656025001 + 559606336 = 112499^2 + 23656^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215631337 - 2² = 13215631333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13215631297 and 13215631306.

It is not a weakly prime, because it can be changed into another prime (13215631333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607815668 + 6607815669.

It is an arithmetic number, because the mean of its divisors is an integer number (6607815669).

Almost surely, 2^13215631337 is an apocalyptic number.

It is an amenable number.

13215631337 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215631337 is an equidigital number, since it uses as much as digits as its factorization.

13215631337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 35.

The spelling of 13215631337 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, three hundred thirty-seven".