2257522621 has 2 divisors, whose sum is σ = 2257522622. Its totient is φ = 2257522620.

The previous prime is 2257522573. The next prime is 2257522637. The reversal of 2257522621 is 1262257522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929405625 + 328116996 = 43925^2 + 18114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2257522621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257522721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128761310 + 1128761311.

It is an arithmetic number, because the mean of its divisors is an integer number (1128761311).

Almost surely, 2^2257522621 is an apocalyptic number.

It is an amenable number.

2257522621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257522621 is an equidigital number, since it uses as much as digits as its factorization.

2257522621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 2257522621 is about 47513.3941220789. The cubic root of 2257522621 is about 1311.8294314389.

The spelling of 2257522621 in words is "two billion, two hundred fifty-seven million, five hundred twenty-two thousand, six hundred twenty-one".