54143865 has 24 divisors (see below), whose sum is σ = 94053960. Its totient is φ = 28813824.

The previous prime is 54143851. The next prime is 54143893. The reversal of 54143865 is 56834145.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23970816 + 30173049 = 4896^2 + 5493^2 .

It is not a de Polignac number, because 54143865 - 2⁷ = 54143737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25671 + ... + 27699.

It is an arithmetic number, because the mean of its divisors is an integer number (3918915).

Almost surely, 2^54143865 is an apocalyptic number.

It is an amenable number.

54143865 is a deficient number, since it is larger than the sum of its proper divisors (39910095).

54143865 is a wasteful number, since it uses less digits than its factorization.

54143865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633 (or 2630 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 54143865 is about 7358.2514906736. The cubic root of 54143865 is about 378.3116812870.

The spelling of 54143865 in words is "fifty-four million, one hundred forty-three thousand, eight hundred sixty-five".