54431999 has 4 divisors (see below), whose sum is σ = 54495936. Its totient is φ = 54368064.

The previous prime is 54431963. The next prime is 54432013. The reversal of 54431999 is 99913445.

It is a happy number.

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 54431999 - 2¹² = 54427903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54431929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30674 + ... + 32399.

It is an arithmetic number, because the mean of its divisors is an integer number (13623984).

Almost surely, 2^54431999 is an apocalyptic number.

54431999 is a deficient number, since it is larger than the sum of its proper divisors (63937).

54431999 is an equidigital number, since it uses as much as digits as its factorization.

54431999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63936.

The product of its digits is 174960, while the sum is 44.

The square root of 54431999 is about 7377.8044837201. The cubic root of 54431999 is about 378.9815735386.

The spelling of 54431999 in words is "fifty-four million, four hundred thirty-one thousand, nine hundred ninety-nine".