54421815 has 32 divisors (see below), whose sum is σ = 99832320. Its totient is φ = 24799104.

The previous prime is 54421769. The next prime is 54421823. The reversal of 54421815 is 51812445.

It is not a de Polignac number, because 54421815 - 2⁶ = 54421751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43377 + ... + 44613.

It is an arithmetic number, because the mean of its divisors is an integer number (3119760).

Almost surely, 2^54421815 is an apocalyptic number.

54421815 is a deficient number, since it is larger than the sum of its proper divisors (45410505).

54421815 is a wasteful number, since it uses less digits than its factorization.

54421815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 6400, while the sum is 30.

The square root of 54421815 is about 7377.1142732101. The cubic root of 54421815 is about 378.9579367738.

The spelling of 54421815 in words is "fifty-four million, four hundred twenty-one thousand, eight hundred fifteen".