2556425831 has 4 divisors (see below), whose sum is σ = 2575940664. Its totient is φ = 2536911000.

The previous prime is 2556425821. The next prime is 2556425849. The reversal of 2556425831 is 1385246552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556425831 is a prime.

It is a super-2 number, since 2×2556425831² = 13070626058808081122, 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 (2556425821) 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, 9757220 + ... + 9757481.

It is an arithmetic number, because the mean of its divisors is an integer number (643985166).

Almost surely, 2^2556425831 is an apocalyptic number.

2556425831 is a deficient number, since it is larger than the sum of its proper divisors (19514833).

2556425831 is a wasteful number, since it uses less digits than its factorization.

2556425831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19514832.

The product of its digits is 288000, while the sum is 41.

The square root of 2556425831 is about 50561.1098671696. The cubic root of 2556425831 is about 1367.3438209298.

The spelling of 2556425831 in words is "two billion, five hundred fifty-six million, four hundred twenty-five thousand, eight hundred thirty-one".