54451221 has 48 divisors (see below), whose sum is σ = 87511104. Its totient is φ = 29760000.

The previous prime is 54451219. The next prime is 54451253. The reversal of 54451221 is 12215445.

It is not a de Polignac number, because 54451221 - 2¹ = 54451219 is a prime.

It is a super-3 number, since 3×54451221³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54451191 and 54451200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54451261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 539071 + ... + 539171.

It is an arithmetic number, because the mean of its divisors is an integer number (1823148).

Almost surely, 2^54451221 is an apocalyptic number.

54451221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54451221 is a deficient number, since it is larger than the sum of its proper divisors (33059883).

54451221 is a wasteful number, since it uses less digits than its factorization.

54451221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 163 counting only the distinct ones).

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

The square root of 54451221 is about 7379.1070598007. The cubic root of 54451221 is about 379.0261792031.

Adding to 54451221 its reverse (12215445), we get a palindrome (66666666).

It can be divided in two parts, 5445 and 1221, that added together give a palindrome (6666).

The spelling of 54451221 in words is "fifty-four million, four hundred fifty-one thousand, two hundred twenty-one".