2531408557 has 4 divisors (see below), whose sum is σ = 2538306496. Its totient is φ = 2524510620.

The previous prime is 2531408549. The next prime is 2531408563. The reversal of 2531408557 is 7558041352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2531408557 - 2³ = 2531408549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531408527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3448419 + ... + 3449152.

It is an arithmetic number, because the mean of its divisors is an integer number (634576624).

Almost surely, 2^2531408557 is an apocalyptic number.

It is an amenable number.

2531408557 is a deficient number, since it is larger than the sum of its proper divisors (6897939).

2531408557 is an equidigital number, since it uses as much as digits as its factorization.

2531408557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6897938.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2531408557 is about 50313.1052212045. The cubic root of 2531408557 is about 1362.8689000487.

The spelling of 2531408557 in words is "two billion, five hundred thirty-one million, four hundred eight thousand, five hundred fifty-seven".