54320221 has 4 divisors (see below), whose sum is σ = 57179200. Its totient is φ = 51461244.

The previous prime is 54320213. The next prime is 54320251. The reversal of 54320221 is 12202345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54320221 - 2³ = 54320213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 2858959 = 54320221 / (5 + 4 + 3 + 2 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54320251) 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, 1429461 + ... + 1429498.

It is an arithmetic number, because the mean of its divisors is an integer number (14294800).

Almost surely, 2^54320221 is an apocalyptic number.

It is an amenable number.

54320221 is a deficient number, since it is larger than the sum of its proper divisors (2858979).

54320221 is a wasteful number, since it uses less digits than its factorization.

54320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858978.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 54320221 is about 7370.2253018480. The cubic root of 54320221 is about 378.7219784880.

Adding to 54320221 its reverse (12202345), we get a palindrome (66522566).

The spelling of 54320221 in words is "fifty-four million, three hundred twenty thousand, two hundred twenty-one".