2256457531 has 2 divisors, whose sum is σ = 2256457532. Its totient is φ = 2256457530.

The previous prime is 2256457529. The next prime is 2256457547. The reversal of 2256457531 is 1357546522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2256457531 - 2¹ = 2256457529 is a prime.

It is a super-2 number, since 2×2256457531² = 10183201178413231922, which contains 22 as substring.

Together with 2256457529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2256457501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128228765 + 1128228766.

It is an arithmetic number, because the mean of its divisors is an integer number (1128228766).

Almost surely, 2^2256457531 is an apocalyptic number.

2256457531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256457531 is an equidigital number, since it uses as much as digits as its factorization.

2256457531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 40.

The square root of 2256457531 is about 47502.1844866107. The cubic root of 2256457531 is about 1311.6230937205.

The spelling of 2256457531 in words is "two billion, two hundred fifty-six million, four hundred fifty-seven thousand, five hundred thirty-one".