542221399 has 2 divisors, whose sum is σ = 542221400. Its totient is φ = 542221398.

The previous prime is 542221349. The next prime is 542221423. The reversal of 542221399 is 993122245.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542221399 - 2¹⁵ = 542188631 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 (542221349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271110699 + 271110700.

It is an arithmetic number, because the mean of its divisors is an integer number (271110700).

Almost surely, 2^542221399 is an apocalyptic number.

542221399 is a deficient number, since it is larger than the sum of its proper divisors (1).

542221399 is an equidigital number, since it uses as much as digits as its factorization.

542221399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 542221399 is about 23285.6479188362. The cubic root of 542221399 is about 815.4403877842.

The spelling of 542221399 in words is "five hundred forty-two million, two hundred twenty-one thousand, three hundred ninety-nine".