3131034012521 has 4 divisors (see below), whose sum is σ = 3131039567700. Its totient is φ = 3131028457344.

The previous prime is 3131034012497. The next prime is 3131034012551. The reversal of 3131034012521 is 1252104301313.

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 2686993032025 + 444040980496 = 1639205^2 + 666364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131034012521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131034012551) 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, 1822736 + ... + 3095873.

It is an arithmetic number, because the mean of its divisors is an integer number (782759891925).

Almost surely, 2^{3131034012521} is an apocalyptic number.

It is an amenable number.

3131034012521 is a deficient number, since it is larger than the sum of its proper divisors (5555179).

3131034012521 is an equidigital number, since it uses as much as digits as its factorization.

3131034012521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555178.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 3131034012521 its reverse (1252104301313), we get a palindrome (4383138313834).

The spelling of 3131034012521 in words is "three trillion, one hundred thirty-one billion, thirty-four million, twelve thousand, five hundred twenty-one".