54280391 has 16 divisors (see below), whose sum is σ = 62657280. Its totient is φ = 46537920.

The previous prime is 54280381. The next prime is 54280393. The reversal of 54280391 is 19308245.

It is a de Polignac number, because none of the positive numbers 2^k-54280391 is a prime.

It is a super-2 number, since 2×54280391² = 5892721694225762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54280393) 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, 17000 + ... + 19938.

It is an arithmetic number, because the mean of its divisors is an integer number (3916080).

Almost surely, 2^54280391 is an apocalyptic number.

54280391 is a deficient number, since it is larger than the sum of its proper divisors (8376889).

54280391 is a wasteful number, since it uses less digits than its factorization.

54280391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 54280391 is about 7367.5227179833. The cubic root of 54280391 is about 378.6293905928.

The spelling of 54280391 in words is "fifty-four million, two hundred eighty thousand, three hundred ninety-one".