54228509 has 2 divisors, whose sum is σ = 54228510. Its totient is φ = 54228508.

The previous prime is 54228497. The next prime is 54228533. The reversal of 54228509 is 90582245.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 2316484 = 7205^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 54228509 - 2⁸ = 54228253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54228539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27114254 + 27114255.

It is an arithmetic number, because the mean of its divisors is an integer number (27114255).

Almost surely, 2^54228509 is an apocalyptic number.

It is an amenable number.

54228509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54228509 is an equidigital number, since it uses as much as digits as its factorization.

54228509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 54228509 is about 7364.0008826724. Note that the first 3 decimals coincide. The cubic root of 54228509 is about 378.5087189488.

It can be divided in two parts, 5422 and 8509, that added together give a palindrome (13931).

The spelling of 54228509 in words is "fifty-four million, two hundred twenty-eight thousand, five hundred nine".