55563775 has 12 divisors (see below), whose sum is σ = 69406272. Its totient is φ = 44123840.

The previous prime is 55563773. The next prime is 55563779. The reversal of 55563775 is 57736555.

It is not a de Polignac number, because 55563775 - 2¹ = 55563773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55563773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4687 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (5783856).

Almost surely, 2^55563775 is an apocalyptic number.

55563775 is a deficient number, since it is larger than the sum of its proper divisors (13842497).

55563775 is a wasteful number, since it uses less digits than its factorization.

55563775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16370 (or 16365 counting only the distinct ones).

The product of its digits is 551250, while the sum is 43.

The square root of 55563775 is about 7454.1112817022. Note that the first 3 decimals coincide. The cubic root of 55563775 is about 381.5902310867.

The spelling of 55563775 in words is "fifty-five million, five hundred sixty-three thousand, seven hundred seventy-five".