2256138551 has 2 divisors, whose sum is σ = 2256138552. Its totient is φ = 2256138550.

The previous prime is 2256138523. The next prime is 2256138557. The reversal of 2256138551 is 1558316522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256138551 - 2⁶ = 2256138487 is a prime.

It is a super-2 number, since 2×2256138551² = 10180322322616759202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256138557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128069275 + 1128069276.

It is an arithmetic number, because the mean of its divisors is an integer number (1128069276).

Almost surely, 2^2256138551 is an apocalyptic number.

2256138551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256138551 is an equidigital number, since it uses as much as digits as its factorization.

2256138551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The square root of 2256138551 is about 47498.8268381441. The cubic root of 2256138551 is about 1311.5612857398.

The spelling of 2256138551 in words is "two billion, two hundred fifty-six million, one hundred thirty-eight thousand, five hundred fifty-one".