54415221 has 16 divisors (see below), whose sum is σ = 87283200. Its totient is φ = 29457648.

The previous prime is 54415213. The next prime is 54415243. The reversal of 54415221 is 12251445.

It is not a de Polignac number, because 54415221 - 2³ = 54415213 is a prime.

It is a super-2 number, since 2×54415221² = 5922032552957682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54415191 and 54415200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54415201) 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, 67791 + ... + 68588.

It is an arithmetic number, because the mean of its divisors is an integer number (5455200).

Almost surely, 2^54415221 is an apocalyptic number.

It is an amenable number.

54415221 is a deficient number, since it is larger than the sum of its proper divisors (32867979).

54415221 is a wasteful number, since it uses less digits than its factorization.

54415221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136408.

The product of its digits is 1600, while the sum is 24.

The square root of 54415221 is about 7376.6673369483. The cubic root of 54415221 is about 378.9426307207.

Adding to 54415221 its reverse (12251445), we get a palindrome (66666666).

The spelling of 54415221 in words is "fifty-four million, four hundred fifteen thousand, two hundred twenty-one".