3130115231521 has 4 divisors (see below), whose sum is σ = 3137344135492. Its totient is φ = 3122886327552.

The previous prime is 3130115231519. The next prime is 3130115231563. The reversal of 3130115231521 is 1251325110313.

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 1837719140625 + 1292396090896 = 1355625^2 + 1136836^2 .

It is a cyclic number.

It is not a de Polignac number, because 3130115231521 - 2¹ = 3130115231519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3130115231521.

It is not an unprimeable number, because it can be changed into a prime (3130115231591) 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, 3614451336 + ... + 3614452201.

It is an arithmetic number, because the mean of its divisors is an integer number (784336033873).

Almost surely, 2^{3130115231521} is an apocalyptic number.

It is an amenable number.

3130115231521 is a deficient number, since it is larger than the sum of its proper divisors (7228903971).

3130115231521 is an equidigital number, since it uses as much as digits as its factorization.

3130115231521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228903970.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 3130115231521 in words is "three trillion, one hundred thirty billion, one hundred fifteen million, two hundred thirty-one thousand, five hundred twenty-one".