55657223 has 2 divisors, whose sum is σ = 55657224. Its totient is φ = 55657222.

The previous prime is 55657219. The next prime is 55657229. The reversal of 55657223 is 32275655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55657223 - 2² = 55657219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55657229) 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, 27828611 + 27828612.

It is an arithmetic number, because the mean of its divisors is an integer number (27828612).

Almost surely, 2^55657223 is an apocalyptic number.

55657223 is a deficient number, since it is larger than the sum of its proper divisors (1).

55657223 is an equidigital number, since it uses as much as digits as its factorization.

55657223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 35.

The square root of 55657223 is about 7460.3768671562. The cubic root of 55657223 is about 381.8040326870.

The spelling of 55657223 in words is "fifty-five million, six hundred fifty-seven thousand, two hundred twenty-three".