54811565 has 16 divisors (see below), whose sum is σ = 68275200. Its totient is φ = 42197760.

The previous prime is 54811529. The next prime is 54811577. The reversal of 54811565 is 56511845.

It is a happy number.

It is not a de Polignac number, because 54811565 - 2⁶ = 54811501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29957 + ... + 31733.

It is an arithmetic number, because the mean of its divisors is an integer number (4267200).

Almost surely, 2^54811565 is an apocalyptic number.

It is an amenable number.

54811565 is a deficient number, since it is larger than the sum of its proper divisors (13463635).

54811565 is a wasteful number, since it uses less digits than its factorization.

54811565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its digits is 24000, while the sum is 35.

The square root of 54811565 is about 7403.4833017979. The cubic root of 54811565 is about 379.8604404411.

The spelling of 54811565 in words is "fifty-four million, eight hundred eleven thousand, five hundred sixty-five".