2256004391 has 2 divisors, whose sum is σ = 2256004392. Its totient is φ = 2256004390.

The previous prime is 2256004249. The next prime is 2256004409. The reversal of 2256004391 is 1934006522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256004391 - 2³⁰ = 1182262567 is a prime.

It is a super-2 number, since 2×2256004391² = 10179111624422561762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256004991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128002195 + 1128002196.

It is an arithmetic number, because the mean of its divisors is an integer number (1128002196).

Almost surely, 2^2256004391 is an apocalyptic number.

2256004391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256004391 is an equidigital number, since it uses as much as digits as its factorization.

2256004391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2256004391 is about 47497.4145717427. The cubic root of 2256004391 is about 1311.5352881417.

The spelling of 2256004391 in words is "two billion, two hundred fifty-six million, four thousand, three hundred ninety-one".