53551663 has 16 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 46598400.

The previous prime is 53551627. The next prime is 53551669. The reversal of 53551663 is 36615535.

It is a cyclic number.

It is not a de Polignac number, because 53551663 - 2⁹ = 53551151 is a prime.

It is a super-2 number, since 2×53551663² = 5735561220131138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53551669) 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, 32268 + ... + 33886.

It is an arithmetic number, because the mean of its divisors is an integer number (3810240).

Almost surely, 2^53551663 is an apocalyptic number.

53551663 is a deficient number, since it is larger than the sum of its proper divisors (7412177).

53551663 is a wasteful number, since it uses less digits than its factorization.

53551663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758.

The product of its digits is 40500, while the sum is 34.

The square root of 53551663 is about 7317.9001769633. The cubic root of 53551663 is about 376.9273524553.

The spelling of 53551663 in words is "fifty-three million, five hundred fifty-one thousand, six hundred sixty-three".