55501563 has 32 divisors (see below), whose sum is σ = 85155840. Its totient is φ = 31893120.

The previous prime is 55501561. The next prime is 55501597. The reversal of 55501563 is 36510555.

It is not a de Polignac number, because 55501563 - 2¹ = 55501561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55501563.

It is not an unprimeable number, because it can be changed into a prime (55501561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34270 + ... + 35852.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^55501563 is an apocalyptic number.

55501563 is a deficient number, since it is larger than the sum of its proper divisors (29654277).

55501563 is a wasteful number, since it uses less digits than its factorization.

55501563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 55501563 is about 7449.9371138285. The cubic root of 55501563 is about 381.4477620233.

The spelling of 55501563 in words is "fifty-five million, five hundred one thousand, five hundred sixty-three".