2551855651 has 2 divisors, whose sum is σ = 2551855652. Its totient is φ = 2551855650.

The previous prime is 2551855643. The next prime is 2551855673. The reversal of 2551855651 is 1565581552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2551855651 - 2³ = 2551855643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2551855598 and 2551855607.

It is not a weakly prime, because it can be changed into another prime (2551855051) 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, 1275927825 + 1275927826.

It is an arithmetic number, because the mean of its divisors is an integer number (1275927826).

Almost surely, 2^2551855651 is an apocalyptic number.

2551855651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551855651 is an equidigital number, since it uses as much as digits as its factorization.

2551855651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300000, while the sum is 43.

The square root of 2551855651 is about 50515.8950331477. The cubic root of 2551855651 is about 1366.5285244534.

The spelling of 2551855651 in words is "two billion, five hundred fifty-one million, eight hundred fifty-five thousand, six hundred fifty-one".