2551511551 has 2 divisors, whose sum is σ = 2551511552. Its totient is φ = 2551511550.

The previous prime is 2551511519. The next prime is 2551511561. The reversal of 2551511551 is 1551151552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2551511551 - 2⁵ = 2551511519 is a prime.

It is a super-2 number, since 2×2551511551² = 13020422389772851202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551511561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275755775 + 1275755776.

It is an arithmetic number, because the mean of its divisors is an integer number (1275755776).

Almost surely, 2^2551511551 is an apocalyptic number.

2551511551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551511551 is an equidigital number, since it uses as much as digits as its factorization.

2551511551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6250, while the sum is 31.

The square root of 2551511551 is about 50512.4890596375. The cubic root of 2551511551 is about 1366.4670994009.

The spelling of 2551511551 in words is "two billion, five hundred fifty-one million, five hundred eleven thousand, five hundred fifty-one".