54510221 has 4 divisors (see below), whose sum is σ = 57379200. Its totient is φ = 51641244.

The previous prime is 54510193. The next prime is 54510233. The reversal of 54510221 is 12201545.

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 54510221 - 2¹⁰ = 54509197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54510193 and 54510202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54510241) 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, 1434461 + ... + 1434498.

It is an arithmetic number, because the mean of its divisors is an integer number (14344800).

Almost surely, 2^54510221 is an apocalyptic number.

It is an amenable number.

54510221 is a deficient number, since it is larger than the sum of its proper divisors (2868979).

54510221 is a wasteful number, since it uses less digits than its factorization.

54510221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868978.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 54510221 is about 7383.1037511334. The cubic root of 54510221 is about 379.1630262877.

Adding to 54510221 its reverse (12201545), we get a palindrome (66711766).

The spelling of 54510221 in words is "fifty-four million, five hundred ten thousand, two hundred twenty-one".