2557711631 has 4 divisors (see below), whose sum is σ = 2558176152. Its totient is φ = 2557247112.

The previous prime is 2557711627. The next prime is 2557711633. The reversal of 2557711631 is 1361177552.

2557711631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2557711631 - 2² = 2557711627 is a prime.

It is a super-2 number, since 2×2557711631² = 13083777574705360322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557711633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223901 + ... + 235046.

It is an arithmetic number, because the mean of its divisors is an integer number (639544038).

Almost surely, 2^2557711631 is an apocalyptic number.

2557711631 is a deficient number, since it is larger than the sum of its proper divisors (464521).

2557711631 is an equidigital number, since it uses as much as digits as its factorization.

2557711631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464520.

The product of its digits is 44100, while the sum is 38.

The square root of 2557711631 is about 50573.8235750472. The cubic root of 2557711631 is about 1367.5730258331.

The spelling of 2557711631 in words is "two billion, five hundred fifty-seven million, seven hundred eleven thousand, six hundred thirty-one".