5631310521 has 6 divisors (see below), whose sum is σ = 8134115210. Its totient is φ = 3754207008.

The previous prime is 5631310507. The next prime is 5631310541. The reversal of 5631310521 is 1250131365.

5631310521 is a `hidden beast` number, since 5 + 6 + 3 + 131 + 0 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5386826025 + 244484496 = 73395^2 + 15636^2 .

It is not a de Polignac number, because 5631310521 - 2⁶ = 5631310457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5631310541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 312850576 + ... + 312850593.

Almost surely, 2^5631310521 is an apocalyptic number.

It is an amenable number.

5631310521 is a deficient number, since it is larger than the sum of its proper divisors (2502804689).

5631310521 is a wasteful number, since it uses less digits than its factorization.

5631310521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625701175 (or 625701172 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 5631310521 is about 75042.0583473028. The cubic root of 5631310521 is about 1779.1114659144. Note that the first 3 decimals are identical.

Adding to 5631310521 its reverse (1250131365), we get a palindrome (6881441886).

The spelling of 5631310521 in words is "five billion, six hundred thirty-one million, three hundred ten thousand, five hundred twenty-one".