54091565 has 16 divisors (see below), whose sum is σ = 71547840. Its totient is φ = 38929920.

The previous prime is 54091553. The next prime is 54091571. The reversal of 54091565 is 56519045.

It is not a de Polignac number, because 54091565 - 2¹⁰ = 54090541 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, 266 + ... + 10404.

It is an arithmetic number, because the mean of its divisors is an integer number (4471740).

Almost surely, 2^54091565 is an apocalyptic number.

54091565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54091565 is a deficient number, since it is larger than the sum of its proper divisors (17456275).

54091565 is a wasteful number, since it uses less digits than its factorization.

54091565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 54091565 is about 7354.6967986451. The cubic root of 54091565 is about 378.1898326098.

The spelling of 54091565 in words is "fifty-four million, ninety-one thousand, five hundred sixty-five".