55417566 has 16 divisors (see below), whose sum is σ = 116668800. Its totient is φ = 17500248.

The previous prime is 55417561. The next prime is 55417577. The reversal of 55417566 is 66571455.

It is a super-2 number, since 2×55417566² = 6142213242728712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55417561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242946 + ... + 243173.

It is an arithmetic number, because the mean of its divisors is an integer number (7291800).

Almost surely, 2^55417566 is an apocalyptic number.

55417566 is an abundant number, since it is smaller than the sum of its proper divisors (61251234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55417566 is a wasteful number, since it uses less digits than its factorization.

55417566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486143.

The product of its digits is 126000, while the sum is 39.

The square root of 55417566 is about 7444.2975491311. The cubic root of 55417566 is about 381.2552350441.

The spelling of 55417566 in words is "fifty-five million, four hundred seventeen thousand, five hundred sixty-six".