2256640031 has 2 divisors, whose sum is σ = 2256640032. Its totient is φ = 2256640030.

The previous prime is 2256639997. The next prime is 2256640037. The reversal of 2256640031 is 1300466522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256640031 - 2³⁰ = 1182898207 is a prime.

It is a super-2 number, since 2×2256640031² = 10184848459023361922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2256639976 and 2256640003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256640037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128320015 + 1128320016.

It is an arithmetic number, because the mean of its divisors is an integer number (1128320016).

Almost surely, 2^2256640031 is an apocalyptic number.

2256640031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256640031 is an equidigital number, since it uses as much as digits as its factorization.

2256640031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2256640031 is about 47504.1054120589. The cubic root of 2256640031 is about 1311.6584536831.

The spelling of 2256640031 in words is "two billion, two hundred fifty-six million, six hundred forty thousand, thirty-one".