546042221 has 2 divisors, whose sum is σ = 546042222. Its totient is φ = 546042220.

The previous prime is 546042187. The next prime is 546042239. The reversal of 546042221 is 122240645.

546042221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532455625 + 13586596 = 23075^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 546042221 - 2⁶ = 546042157 is a prime.

It is a super-2 number, since 2×546042221² = 596324214229225682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (546042281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273021110 + 273021111.

It is an arithmetic number, because the mean of its divisors is an integer number (273021111).

Almost surely, 2^546042221 is an apocalyptic number.

It is an amenable number.

546042221 is a deficient number, since it is larger than the sum of its proper divisors (1).

546042221 is an equidigital number, since it uses as much as digits as its factorization.

546042221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 546042221 is about 23367.5463196289. The cubic root of 546042221 is about 817.3512694727.

Adding to 546042221 its reverse (122240645), we get a palindrome (668282866).

The spelling of 546042221 in words is "five hundred forty-six million, forty-two thousand, two hundred twenty-one".