55253257 has 2 divisors, whose sum is σ = 55253258. Its totient is φ = 55253256.

The previous prime is 55253243. The next prime is 55253279. The reversal of 55253257 is 75235255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54007801 + 1245456 = 7349^2 + 1116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55253257 is a prime.

It is not a weakly prime, because it can be changed into another prime (55253227) 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, 27626628 + 27626629.

It is an arithmetic number, because the mean of its divisors is an integer number (27626629).

Almost surely, 2^55253257 is an apocalyptic number.

It is an amenable number.

55253257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55253257 is an equidigital number, since it uses as much as digits as its factorization.

55253257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52500, while the sum is 34.

The square root of 55253257 is about 7433.2534599595. The cubic root of 55253257 is about 380.8780641432.

The spelling of 55253257 in words is "fifty-five million, two hundred fifty-three thousand, two hundred fifty-seven".