2521979531 has 2 divisors, whose sum is σ = 2521979532. Its totient is φ = 2521979530.

The previous prime is 2521979527. The next prime is 2521979557. The reversal of 2521979531 is 1359791252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2521979531 - 2² = 2521979527 is a prime.

It is a super-2 number, since 2×2521979531² = 12720761509565959922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2521979431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260989765 + 1260989766.

It is an arithmetic number, because the mean of its divisors is an integer number (1260989766).

Almost surely, 2^2521979531 is an apocalyptic number.

2521979531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521979531 is an equidigital number, since it uses as much as digits as its factorization.

2521979531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 2521979531 is about 50219.3143222804. The cubic root of 2521979531 is about 1361.1746503354.

The spelling of 2521979531 in words is "two billion, five hundred twenty-one million, nine hundred seventy-nine thousand, five hundred thirty-one".