542003221 has 2 divisors, whose sum is σ = 542003222. Its totient is φ = 542003220.

The previous prime is 542003213. The next prime is 542003227. The reversal of 542003221 is 122300245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497780721 + 44222500 = 22311^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 542003221 - 2³ = 542003213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542003227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271001610 + 271001611.

It is an arithmetic number, because the mean of its divisors is an integer number (271001611).

Almost surely, 2^542003221 is an apocalyptic number.

It is an amenable number.

542003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

542003221 is an equidigital number, since it uses as much as digits as its factorization.

542003221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 542003221 is about 23280.9626304412. The cubic root of 542003221 is about 815.3310013349.

Adding to 542003221 its reverse (122300245), we get a palindrome (664303466).

The spelling of 542003221 in words is "five hundred forty-two million, three thousand, two hundred twenty-one".