2257657139 has 2 divisors, whose sum is σ = 2257657140. Its totient is φ = 2257657138.

The previous prime is 2257657133. The next prime is 2257657177. The reversal of 2257657139 is 9317567522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2257657139 - 2⁴ = 2257657123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2257657093 and 2257657102.

It is not a weakly prime, because it can be changed into another prime (2257657133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128828569 + 1128828570.

It is an arithmetic number, because the mean of its divisors is an integer number (1128828570).

Almost surely, 2^2257657139 is an apocalyptic number.

2257657139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257657139 is an equidigital number, since it uses as much as digits as its factorization.

2257657139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The square root of 2257657139 is about 47514.8096807722. The cubic root of 2257657139 is about 1311.8554867211.

The spelling of 2257657139 in words is "two billion, two hundred fifty-seven million, six hundred fifty-seven thousand, one hundred thirty-nine".