2551531613 has 2 divisors, whose sum is σ = 2551531614. Its totient is φ = 2551531612.

The previous prime is 2551531597. The next prime is 2551531627. The reversal of 2551531613 is 3161351552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2550957049 + 574564 = 50507^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551531613 - 2⁴ = 2551531597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2551531613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551531313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275765806 + 1275765807.

It is an arithmetic number, because the mean of its divisors is an integer number (1275765807).

Almost surely, 2^2551531613 is an apocalyptic number.

It is an amenable number.

2551531613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551531613 is an equidigital number, since it uses as much as digits as its factorization.

2551531613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 32.

The square root of 2551531613 is about 50512.6876437990. The cubic root of 2551531613 is about 1366.4706808062.

The spelling of 2551531613 in words is "two billion, five hundred fifty-one million, five hundred thirty-one thousand, six hundred thirteen".