55257563 has 4 divisors (see below), whose sum is σ = 55609680. Its totient is φ = 54905448.

The previous prime is 55257551. The next prime is 55257583. The reversal of 55257563 is 36575255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55257563 - 2¹⁸ = 54995419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55257583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175823 + ... + 176136.

It is an arithmetic number, because the mean of its divisors is an integer number (13902420).

Almost surely, 2^55257563 is an apocalyptic number.

55257563 is a deficient number, since it is larger than the sum of its proper divisors (352117).

55257563 is a wasteful number, since it uses less digits than its factorization.

55257563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352116.

The product of its digits is 157500, while the sum is 38.

The square root of 55257563 is about 7433.5430986845. The cubic root of 55257563 is about 380.8879580899.

The spelling of 55257563 in words is "fifty-five million, two hundred fifty-seven thousand, five hundred sixty-three".