221342234 has 4 divisors (see below), whose sum is σ = 332013354. Its totient is φ = 110671116.

The previous prime is 221342203. The next prime is 221342299. The reversal of 221342234 is 432243122.

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

It can be written as a sum of positive squares in only one way, i.e., 185041609 + 36300625 = 13603^2 + 6025^2 .

It is a super-2 number, since 2×221342234² = 97984769104221512, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55335557 + ... + 55335560.

Almost surely, 2^221342234 is an apocalyptic number.

221342234 is a deficient number, since it is larger than the sum of its proper divisors (110671120).

221342234 is a wasteful number, since it uses less digits than its factorization.

221342234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110671119.

The product of its digits is 2304, while the sum is 23.

The square root of 221342234 is about 14877.5748695814. The cubic root of 221342234 is about 604.9062842341.

Adding to 221342234 its reverse (432243122), we get a palindrome (653585356).

The spelling of 221342234 in words is "two hundred twenty-one million, three hundred forty-two thousand, two hundred thirty-four".