54431555 has 4 divisors (see below), whose sum is σ = 65317872. Its totient is φ = 43545240.

The previous prime is 54431543. The next prime is 54431591. The reversal of 54431555 is 55513445.

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

It is not a de Polignac number, because 54431555 - 2¹⁸ = 54169411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5443151 + ... + 5443160.

It is an arithmetic number, because the mean of its divisors is an integer number (16329468).

Almost surely, 2^54431555 is an apocalyptic number.

54431555 is a deficient number, since it is larger than the sum of its proper divisors (10886317).

54431555 is a wasteful number, since it uses less digits than its factorization.

54431555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10886316.

The product of its digits is 30000, while the sum is 32.

The square root of 54431555 is about 7377.7743934062. The cubic root of 54431555 is about 378.9805430891.

The spelling of 54431555 in words is "fifty-four million, four hundred thirty-one thousand, five hundred fifty-five".