2257056987 has 16 divisors (see below), whose sum is σ = 3168908160. Its totient is φ = 1425010752.

The previous prime is 2257056899. The next prime is 2257057007. The reversal of 2257056987 is 7896507522.

It is not a de Polignac number, because 2257056987 - 2¹⁰ = 2257055963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2257057987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224623 + ... + 234455.

It is an arithmetic number, because the mean of its divisors is an integer number (198056760).

Almost surely, 2^2257056987 is an apocalyptic number.

2257056987 is a deficient number, since it is larger than the sum of its proper divisors (911851173).

2257056987 is a wasteful number, since it uses less digits than its factorization.

2257056987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13882.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 2257056987 is about 47508.4938405755. The cubic root of 2257056987 is about 1311.7392330977.

The spelling of 2257056987 in words is "two billion, two hundred fifty-seven million, fifty-six thousand, nine hundred eighty-seven".