55257589 has 2 divisors, whose sum is σ = 55257590. Its totient is φ = 55257588.

The previous prime is 55257583. The next prime is 55257611. The reversal of 55257589 is 98575255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55249489 + 8100 = 7433^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 55257589 - 2⁹ = 55257077 is a prime.

It is a super-2 number, since 2×55257589² = 6106802284185842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55257583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27628794 + 27628795.

It is an arithmetic number, because the mean of its divisors is an integer number (27628795).

Almost surely, 2^55257589 is an apocalyptic number.

It is an amenable number.

55257589 is a deficient number, since it is larger than the sum of its proper divisors (1).

55257589 is an equidigital number, since it uses as much as digits as its factorization.

55257589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630000, while the sum is 46.

The square root of 55257589 is about 7433.5448475139. The cubic root of 55257589 is about 380.8880178289. Note that the first 3 decimals are identical.

The spelling of 55257589 in words is "fifty-five million, two hundred fifty-seven thousand, five hundred eighty-nine".