55591563 has 8 divisors (see below), whose sum is σ = 74165248. Its totient is φ = 37039464.

The previous prime is 55591519. The next prime is 55591567. The reversal of 55591563 is 36519555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55591563 - 2⁹ = 55591051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55591567) 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, 2106 + ... + 10752.

It is an arithmetic number, because the mean of its divisors is an integer number (9270656).

Almost surely, 2^55591563 is an apocalyptic number.

55591563 is a deficient number, since it is larger than the sum of its proper divisors (18573685).

55591563 is a wasteful number, since it uses less digits than its factorization.

55591563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10793.

The product of its digits is 101250, while the sum is 39.

The square root of 55591563 is about 7455.9749865460. The cubic root of 55591563 is about 381.6538328499.

The spelling of 55591563 in words is "fifty-five million, five hundred ninety-one thousand, five hundred sixty-three".