2531130521 has 8 divisors (see below), whose sum is σ = 2603545224. Its totient is φ = 2458926720.

The previous prime is 2531130491. The next prime is 2531130571. The reversal of 2531130521 is 1250311352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 196308121 + 2334822400 = 14011^2 + 48320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531130521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531130571) 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, 28220 + ... + 76541.

It is an arithmetic number, because the mean of its divisors is an integer number (325443153).

Almost surely, 2^2531130521 is an apocalyptic number.

It is an amenable number.

2531130521 is a deficient number, since it is larger than the sum of its proper divisors (72414703).

2531130521 is a wasteful number, since it uses less digits than its factorization.

2531130521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105451.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2531130521 is about 50310.3420878849. The cubic root of 2531130521 is about 1362.8190015458.

Adding to 2531130521 its reverse (1250311352), we get a palindrome (3781441873).

The spelling of 2531130521 in words is "two billion, five hundred thirty-one million, one hundred thirty thousand, five hundred twenty-one".