54431239 has 4 divisors (see below), whose sum is σ = 54669160. Its totient is φ = 54193320.

The previous prime is 54431233. The next prime is 54431261. The reversal of 54431239 is 93213445.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54431239 - 2¹⁵ = 54398471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54431239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54431233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118617 + ... + 119074.

It is an arithmetic number, because the mean of its divisors is an integer number (13667290).

Almost surely, 2^54431239 is an apocalyptic number.

54431239 is a deficient number, since it is larger than the sum of its proper divisors (237921).

54431239 is a wasteful number, since it uses less digits than its factorization.

54431239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237920.

The product of its digits is 12960, while the sum is 31.

The square root of 54431239 is about 7377.7529777026. The cubic root of 54431239 is about 378.9798097027.

The spelling of 54431239 in words is "fifty-four million, four hundred thirty-one thousand, two hundred thirty-nine".