54355221 has 12 divisors (see below), whose sum is σ = 78579072. Its totient is φ = 36206376.

The previous prime is 54355207. The next prime is 54355229. The reversal of 54355221 is 12255345.

It is a happy number.

54355221 is a `hidden beast` number, since 5 + 435 + 5 + 221 = 666.

It is not a de Polignac number, because 54355221 - 2¹⁰ = 54354197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54355229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15580 + ... + 18746.

It is an arithmetic number, because the mean of its divisors is an integer number (6548256).

Almost surely, 2^54355221 is an apocalyptic number.

It is an amenable number.

54355221 is a deficient number, since it is larger than the sum of its proper divisors (24223851).

54355221 is a wasteful number, since it uses less digits than its factorization.

54355221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080 (or 5077 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 54355221 is about 7372.5993380897. The cubic root of 54355221 is about 378.8033013245.

The spelling of 54355221 in words is "fifty-four million, three hundred fifty-five thousand, two hundred twenty-one".