5131521544 has 32 divisors (see below), whose sum is σ = 9876254040. Its totient is φ = 2498688000.

The previous prime is 5131521541. The next prime is 5131521547. The reversal of 5131521544 is 4451251315.

It is an interprime number because it is at equal distance from previous prime (5131521541) and next prime (5131521547).

It can be written as a sum of positive squares in 4 ways, for example, as 3631508644 + 1500012900 = 60262^2 + 38730^2 .

It is a super-2 number, since 2×5131521544² = 52665026713072287872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5131521541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2769 + ... + 101344.

Almost surely, 2^5131521544 is an apocalyptic number.

It is an amenable number.

5131521544 is a deficient number, since it is larger than the sum of its proper divisors (4744732496).

5131521544 is a wasteful number, since it uses less digits than its factorization.

5131521544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104281 (or 104277 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 5131521544 is about 71634.6392745856. The cubic root of 5131521544 is about 1724.8396175470.

Adding to 5131521544 its reverse (4451251315), we get a palindrome (9582772859).

The spelling of 5131521544 in words is "five billion, one hundred thirty-one million, five hundred twenty-one thousand, five hundred forty-four".