2551231169 has 2 divisors, whose sum is σ = 2551231170. Its totient is φ = 2551231168.

The previous prime is 2551231147. The next prime is 2551231183. The reversal of 2551231169 is 9611321552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2037619600 + 513611569 = 45140^2 + 22663^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551231169 - 2¹² = 2551227073 is a prime.

It is a super-2 number, since 2×2551231169² = 13017560955354213122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2551231129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275615584 + 1275615585.

It is an arithmetic number, because the mean of its divisors is an integer number (1275615585).

Almost surely, 2^2551231169 is an apocalyptic number.

It is an amenable number.

2551231169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551231169 is an equidigital number, since it uses as much as digits as its factorization.

2551231169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 2551231169 is about 50509.7136103542. The cubic root of 2551231169 is about 1366.4170445209.

The spelling of 2551231169 in words is "two billion, five hundred fifty-one million, two hundred thirty-one thousand, one hundred sixty-nine".