53551563 has 16 divisors (see below), whose sum is σ = 77118720. Its totient is φ = 32858784.

The previous prime is 53551549. The next prime is 53551577. The reversal of 53551563 is 36515535.

It is an interprime number because it is at equal distance from previous prime (53551549) and next prime (53551577).

It is not a de Polignac number, because 53551563 - 2⁹ = 53551051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53551523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12970 + ... + 16592.

It is an arithmetic number, because the mean of its divisors is an integer number (4819920).

Almost surely, 2^53551563 is an apocalyptic number.

53551563 is a deficient number, since it is larger than the sum of its proper divisors (23567157).

53551563 is a wasteful number, since it uses less digits than its factorization.

53551563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018.

The product of its digits is 33750, while the sum is 33.

The square root of 53551563 is about 7317.8933443991. The cubic root of 53551563 is about 376.9271178360.

The spelling of 53551563 in words is "fifty-three million, five hundred fifty-one thousand, five hundred sixty-three".