2056817831 has 2 divisors, whose sum is σ = 2056817832. Its totient is φ = 2056817830.

The previous prime is 2056817801. The next prime is 2056817843. The reversal of 2056817831 is 1387186502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056817831 is a prime.

It is a super-2 number, since 2×2056817831² = 8460999179839089122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056817801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028408915 + 1028408916.

It is an arithmetic number, because the mean of its divisors is an integer number (1028408916).

Almost surely, 2^2056817831 is an apocalyptic number.

2056817831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056817831 is an equidigital number, since it uses as much as digits as its factorization.

2056817831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 2056817831 is about 45352.1535431340. The cubic root of 2056817831 is about 1271.7408146331.

The spelling of 2056817831 in words is "two billion, fifty-six million, eight hundred seventeen thousand, eight hundred thirty-one".