54871665 has 16 divisors (see below), whose sum is σ = 92959488. Its totient is φ = 27543296.

The previous prime is 54871627. The next prime is 54871667. The reversal of 54871665 is 56617845.

It is a cyclic number.

It is not a de Polignac number, because 54871665 - 2⁸ = 54871409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54871667) 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, 107337 + ... + 107846.

It is an arithmetic number, because the mean of its divisors is an integer number (5809968).

Almost surely, 2^54871665 is an apocalyptic number.

It is an amenable number.

54871665 is a deficient number, since it is larger than the sum of its proper divisors (38087823).

54871665 is a wasteful number, since it uses less digits than its factorization.

54871665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215208.

The product of its digits is 201600, while the sum is 42.

The square root of 54871665 is about 7407.5410899974. The cubic root of 54871665 is about 379.9992266836. Note that the first 3 decimals are identical.

The spelling of 54871665 in words is "fifty-four million, eight hundred seventy-one thousand, six hundred sixty-five".