55255657 has 2 divisors, whose sum is σ = 55255658. Its totient is φ = 55255656.

The previous prime is 55255649. The next prime is 55255663. The reversal of 55255657 is 75655255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50637456 + 4618201 = 7116^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 55255657 - 2³ = 55255649 is a prime.

It is not a weakly prime, because it can be changed into another prime (55255687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27627828 + 27627829.

It is an arithmetic number, because the mean of its divisors is an integer number (27627829).

Almost surely, 2^55255657 is an apocalyptic number.

It is an amenable number.

55255657 is a deficient number, since it is larger than the sum of its proper divisors (1).

55255657 is an equidigital number, since it uses as much as digits as its factorization.

55255657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262500, while the sum is 40.

The square root of 55255657 is about 7433.4148949188. The cubic root of 55255657 is about 380.8835787148.

The spelling of 55255657 in words is "fifty-five million, two hundred fifty-five thousand, six hundred fifty-seven".