542214221 has 4 divisors (see below), whose sum is σ = 552444732. Its totient is φ = 531983712.

The previous prime is 542214203. The next prime is 542214223. The reversal of 542214221 is 122412245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324504196 + 217710025 = 18014^2 + 14755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542214221 is a prime.

It is a super-2 number, since 2×542214221² = 587992522909273682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542214223) 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, 5115176 + ... + 5115281.

It is an arithmetic number, because the mean of its divisors is an integer number (138111183).

Almost surely, 2^542214221 is an apocalyptic number.

It is an amenable number.

542214221 is a deficient number, since it is larger than the sum of its proper divisors (10230511).

542214221 is a wasteful number, since it uses less digits than its factorization.

542214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230510.

The product of its digits is 1280, while the sum is 23.

The square root of 542214221 is about 23285.4937890524. The cubic root of 542214221 is about 815.4367894650.

Adding to 542214221 its reverse (122412245), we get a palindrome (664626466).

The spelling of 542214221 in words is "five hundred forty-two million, two hundred fourteen thousand, two hundred twenty-one".