54243220 has 12 divisors (see below), whose sum is σ = 113910804. Its totient is φ = 21697280.

The previous prime is 54243197. The next prime is 54243227. The reversal of 54243220 is 2234245.

It can be written as a sum of positive squares in 2 ways, for example, as 5550736 + 48692484 = 2356^2 + 6978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 54243191 and 54243200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54243227) 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, 1356061 + ... + 1356100.

It is an arithmetic number, because the mean of its divisors is an integer number (9492567).

Almost surely, 2^54243220 is an apocalyptic number.

It is an amenable number.

54243220 is an abundant number, since it is smaller than the sum of its proper divisors (59667584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54243220 is a wasteful number, since it uses less digits than its factorization.

54243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712170 (or 2712168 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 54243220 is about 7364.9996605567. Note that the first 3 decimals coincide. The cubic root of 54243220 is about 378.5429428803.

Adding to 54243220 its reverse (2234245), we get a palindrome (56477465).

The spelling of 54243220 in words is "fifty-four million, two hundred forty-three thousand, two hundred twenty".