2513397131321 has 4 divisors (see below), whose sum is σ = 2554600363044. Its totient is φ = 2472193899600.

The previous prime is 2513397131303. The next prime is 2513397131353. The reversal of 2513397131321 is 1231317933152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95484090025 + 2417913041296 = 309005^2 + 1554964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513397131321 - 2¹⁰ = 2513397130297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513397131221) 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, 20601615770 + ... + 20601615891.

It is an arithmetic number, because the mean of its divisors is an integer number (638650090761).

Almost surely, 2^{2513397131321} is an apocalyptic number.

It is an amenable number.

2513397131321 is a deficient number, since it is larger than the sum of its proper divisors (41203231723).

2513397131321 is an equidigital number, since it uses as much as digits as its factorization.

2513397131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41203231722.

The product of its digits is 102060, while the sum is 41.

The spelling of 2513397131321 in words is "two trillion, five hundred thirteen billion, three hundred ninety-seven million, one hundred thirty-one thousand, three hundred twenty-one".