55993563 has 24 divisors (see below), whose sum is σ = 85924800. Its totient is φ = 35015424.

The previous prime is 55993559. The next prime is 55993571. The reversal of 55993563 is 36539955.

It is a happy number.

55993563 is a `hidden beast` number, since 5 + 599 + 3 + 56 + 3 = 666.

It is not a de Polignac number, because 55993563 - 2² = 55993559 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55993163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77518 + ... + 78236.

It is an arithmetic number, because the mean of its divisors is an integer number (3580200).

Almost surely, 2^55993563 is an apocalyptic number.

55993563 is a deficient number, since it is larger than the sum of its proper divisors (29931237).

55993563 is a wasteful number, since it uses less digits than its factorization.

55993563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1248 counting only the distinct ones).

The product of its digits is 546750, while the sum is 45.

The square root of 55993563 is about 7482.8846710343. The cubic root of 55993563 is about 382.5715770189.

The spelling of 55993563 in words is "fifty-five million, nine hundred ninety-three thousand, five hundred sixty-three".