54278865 has 24 divisors (see below), whose sum is σ = 97329960. Its totient is φ = 27949824.

The previous prime is 54278849. The next prime is 54278881. The reversal of 54278865 is 56887245.

It is an interprime number because it is at equal distance from previous prime (54278849) and next prime (54278881).

It can be written as a sum of positive squares in 4 ways, for example, as 1527696 + 52751169 = 1236^2 + 7263^2 .

It is not a de Polignac number, because 54278865 - 2⁴ = 54278849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 54278865.

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, 19492 + ... + 22101.

It is an arithmetic number, because the mean of its divisors is an integer number (4055415).

Almost surely, 2^54278865 is an apocalyptic number.

It is an amenable number.

54278865 is a deficient number, since it is larger than the sum of its proper divisors (43051095).

54278865 is a wasteful number, since it uses less digits than its factorization.

54278865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41633 (or 41630 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 54278865 is about 7367.4191546294. The cubic root of 54278865 is about 378.6258423878.

The spelling of 54278865 in words is "fifty-four million, two hundred seventy-eight thousand, eight hundred sixty-five".