542221447 has 2 divisors, whose sum is σ = 542221448. Its totient is φ = 542221446.

The previous prime is 542221423. The next prime is 542221483. The reversal of 542221447 is 744122245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542221447 - 2²³ = 533832839 is a prime.

It is a super-3 number, since 3×542221447³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542224447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271110723 + 271110724.

It is an arithmetic number, because the mean of its divisors is an integer number (271110724).

Almost surely, 2^542221447 is an apocalyptic number.

542221447 is a deficient number, since it is larger than the sum of its proper divisors (1).

542221447 is an equidigital number, since it uses as much as digits as its factorization.

542221447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 31.

The square root of 542221447 is about 23285.6489495139. The cubic root of 542221447 is about 815.4404118464.

The spelling of 542221447 in words is "five hundred forty-two million, two hundred twenty-one thousand, four hundred forty-seven".