2257521537 has 16 divisors (see below), whose sum is σ = 3171584000. Its totient is φ = 1424393424.

The previous prime is 2257521529. The next prime is 2257521547. The reversal of 2257521537 is 7351257522.

It is not a de Polignac number, because 2257521537 - 2³ = 2257521529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2257521495 and 2257521504.

It is not an unprimeable number, because it can be changed into a prime (2257521527) 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 in 15 ways as a sum of consecutive naturals, for example, 40164 + ... + 78282.

It is an arithmetic number, because the mean of its divisors is an integer number (198224000).

Almost surely, 2^2257521537 is an apocalyptic number.

It is an amenable number.

2257521537 is a deficient number, since it is larger than the sum of its proper divisors (914062463).

2257521537 is a wasteful number, since it uses less digits than its factorization.

2257521537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39180.

The product of its digits is 147000, while the sum is 39.

The square root of 2257521537 is about 47513.3827147678. The cubic root of 2257521537 is about 1311.8292214708.

The spelling of 2257521537 in words is "two billion, two hundred fifty-seven million, five hundred twenty-one thousand, five hundred thirty-seven".