2551251569 has 2 divisors, whose sum is σ = 2551251570. Its totient is φ = 2551251568.

The previous prime is 2551251553. The next prime is 2551251589. The reversal of 2551251569 is 9651521552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2340624400 + 210627169 = 48380^2 + 14513^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551251569 - 2⁴ = 2551251553 is a prime.

It is a super-2 number, since 2×2551251569² = 13017769136649923522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2551251529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275625784 + 1275625785.

It is an arithmetic number, because the mean of its divisors is an integer number (1275625785).

Almost surely, 2^2551251569 is an apocalyptic number.

It is an amenable number.

2551251569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551251569 is an equidigital number, since it uses as much as digits as its factorization.

2551251569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 41.

The square root of 2551251569 is about 50509.9155513054. The cubic root of 2551251569 is about 1366.4206865316.

The spelling of 2551251569 in words is "two billion, five hundred fifty-one million, two hundred fifty-one thousand, five hundred sixty-nine".