542423081 has 2 divisors, whose sum is σ = 542423082. Its totient is φ = 542423080.

The previous prime is 542423033. The next prime is 542423093. The reversal of 542423081 is 180324245.

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., 414529600 + 127893481 = 20360^2 + 11309^2 .

It is a cyclic number.

It is not a de Polignac number, because 542423081 - 2¹⁸ = 542160937 is a prime.

It is a super-2 number, since 2×542423081² = 588445597603065122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542453081) 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, 271211540 + 271211541.

It is an arithmetic number, because the mean of its divisors is an integer number (271211541).

Almost surely, 2^542423081 is an apocalyptic number.

It is an amenable number.

542423081 is a deficient number, since it is larger than the sum of its proper divisors (1).

542423081 is an equidigital number, since it uses as much as digits as its factorization.

542423081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 542423081 is about 23289.9781236479. The cubic root of 542423081 is about 815.5414776479.

The spelling of 542423081 in words is "five hundred forty-two million, four hundred twenty-three thousand, eighty-one".