2551400261 has 2 divisors, whose sum is σ = 2551400262. Its totient is φ = 2551400260.

The previous prime is 2551400221. The next prime is 2551400279. The reversal of 2551400261 is 1620041552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2537036161 + 14364100 = 50369^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551400261 - 2⁶ = 2551400197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2551400261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551400221) 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, 1275700130 + 1275700131.

It is an arithmetic number, because the mean of its divisors is an integer number (1275700131).

Almost surely, 2^2551400261 is an apocalyptic number.

It is an amenable number.

2551400261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551400261 is an equidigital number, since it uses as much as digits as its factorization.

2551400261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2551400261 is about 50511.3874388736. The cubic root of 2551400261 is about 1366.4472319182.

The spelling of 2551400261 in words is "two billion, five hundred fifty-one million, four hundred thousand, two hundred sixty-one".