54431221 has 16 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 49180608.

The previous prime is 54431213. The next prime is 54431233. The reversal of 54431221 is 12213445.

It is a cyclic number.

It is not a de Polignac number, because 54431221 - 2³ = 54431213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54431192 and 54431201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54431261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151440 + ... + 151798.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^54431221 is an apocalyptic number.

It is an amenable number.

54431221 is a deficient number, since it is larger than the sum of its proper divisors (5443979).

54431221 is a wasteful number, since it uses less digits than its factorization.

54431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 960, while the sum is 22.

The square root of 54431221 is about 7377.7517578189. The cubic root of 54431221 is about 378.9797679274.

Adding to 54431221 its reverse (12213445), we get a palindrome (66644666).

The spelling of 54431221 in words is "fifty-four million, four hundred thirty-one thousand, two hundred twenty-one".