55819563 has 8 divisors (see below), whose sum is σ = 74548800. Its totient is φ = 37151688.

The previous prime is 55819553. The next prime is 55819567. The reversal of 55819563 is 36591855.

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

It is not a de Polignac number, because 55819563 - 2¹⁴ = 55803179 is a prime.

It is a super-2 number, since 2×55819563² = 6231647227021938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55819567) 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, 13173 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (9318600).

Almost surely, 2^55819563 is an apocalyptic number.

55819563 is a deficient number, since it is larger than the sum of its proper divisors (18729237).

55819563 is a wasteful number, since it uses less digits than its factorization.

55819563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30681.

The product of its digits is 162000, while the sum is 42.

The square root of 55819563 is about 7471.2490923540. The cubic root of 55819563 is about 382.1748854297.

The spelling of 55819563 in words is "fifty-five million, eight hundred nineteen thousand, five hundred sixty-three".