2521276391 has 2 divisors, whose sum is σ = 2521276392. Its totient is φ = 2521276390.

The previous prime is 2521276369. The next prime is 2521276393. The reversal of 2521276391 is 1936721252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521276391 - 2³⁰ = 1447534567 is a prime.

Together with 2521276393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521276393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260638195 + 1260638196.

It is an arithmetic number, because the mean of its divisors is an integer number (1260638196).

Almost surely, 2^2521276391 is an apocalyptic number.

2521276391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521276391 is an equidigital number, since it uses as much as digits as its factorization.

2521276391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 2521276391 is about 50212.3131413003. The cubic root of 2521276391 is about 1361.0481379017.

The spelling of 2521276391 in words is "two billion, five hundred twenty-one million, two hundred seventy-six thousand, three hundred ninety-one".