2551445389 has 2 divisors, whose sum is σ = 2551445390. Its totient is φ = 2551445388.

The previous prime is 2551445333. The next prime is 2551445399. The reversal of 2551445389 is 9835441552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1625460489 + 925984900 = 40317^2 + 30430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551445389 - 2⁹ = 2551444877 is a prime.

It is a super-2 number, since 2×2551445389² = 13019747146098722642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551445329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275722694 + 1275722695.

It is an arithmetic number, because the mean of its divisors is an integer number (1275722695).

Almost surely, 2^2551445389 is an apocalyptic number.

It is an amenable number.

2551445389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551445389 is an equidigital number, since it uses as much as digits as its factorization.

2551445389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 46.

The square root of 2551445389 is about 50511.8341480489. The cubic root of 2551445389 is about 1366.4552882351.

The spelling of 2551445389 in words is "two billion, five hundred fifty-one million, four hundred forty-five thousand, three hundred eighty-nine".