54224021 has 2 divisors, whose sum is σ = 54224022. Its totient is φ = 54224020.

The previous prime is 54223987. The next prime is 54224029. The reversal of 54224021 is 12042245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52562500 + 1661521 = 7250^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 54224021 - 2¹⁰ = 54222997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54223984 and 54224002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54224029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27112010 + 27112011.

It is an arithmetic number, because the mean of its divisors is an integer number (27112011).

Almost surely, 2^54224021 is an apocalyptic number.

It is an amenable number.

54224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54224021 is an equidigital number, since it uses as much as digits as its factorization.

54224021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 54224021 is about 7363.6961507113. The cubic root of 54224021 is about 378.4982767538.

Adding to 54224021 its reverse (12042245), we get a palindrome (66266266).

The spelling of 54224021 in words is "fifty-four million, two hundred twenty-four thousand, twenty-one".