13215520131364 has 12 divisors (see below), whose sum is σ = 23138626362124. Its totient is φ = 6604484027904.

The previous prime is 13215520131361. The next prime is 13215520131367. The reversal of 13215520131364 is 46313102551231.

It is an interprime number because it is at equal distance from previous prime (13215520131361) and next prime (13215520131367).

It can be written as a sum of positive squares in 2 ways, for example, as 11659438526464 + 1556081604900 = 3414592^2 + 1247430^2 .

It is not an unprimeable number, because it can be changed into a prime (13215520131361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819000369 + ... + 819016504.

Almost surely, 2^{13215520131364} is an apocalyptic number.

It is an amenable number.

13215520131364 is a deficient number, since it is larger than the sum of its proper divisors (9923106230760).

13215520131364 is a wasteful number, since it uses less digits than its factorization.

13215520131364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638018894 (or 1638018892 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 13215520131364 its reverse (46313102551231), we get a palindrome (59528622682595).

The spelling of 13215520131364 in words is "thirteen trillion, two hundred fifteen billion, five hundred twenty million, one hundred thirty-one thousand, three hundred sixty-four".