542212321 has 4 divisors (see below), whose sum is σ = 619671232. Its totient is φ = 464753412.

The previous prime is 542212309. The next prime is 542212337. The reversal of 542212321 is 123212245.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542212321 - 2¹⁷ = 542081249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542212292 and 542212301.

It is not an unprimeable number, because it can be changed into a prime (542212361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38729445 + ... + 38729458.

It is an arithmetic number, because the mean of its divisors is an integer number (154917808).

Almost surely, 2^542212321 is an apocalyptic number.

It is an amenable number.

542212321 is a deficient number, since it is larger than the sum of its proper divisors (77458911).

542212321 is an equidigital number, since it uses as much as digits as its factorization.

542212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77458910.

The product of its digits is 960, while the sum is 22.

The square root of 542212321 is about 23285.4529910844. The cubic root of 542212321 is about 815.4358369930.

Adding to 542212321 its reverse (123212245), we get a palindrome (665424566).

The spelling of 542212321 in words is "five hundred forty-two million, two hundred twelve thousand, three hundred twenty-one".