221322434 has 4 divisors (see below), whose sum is σ = 331983654. Its totient is φ = 110661216.

The previous prime is 221322433. The next prime is 221322443. The reversal of 221322434 is 434223122.

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., 200647225 + 20675209 = 14165^2 + 4547^2 .

It is not an unprimeable number, because it can be changed into a prime (221322433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55330607 + ... + 55330610.

Almost surely, 2^221322434 is an apocalyptic number.

221322434 is a deficient number, since it is larger than the sum of its proper divisors (110661220).

221322434 is a wasteful number, since it uses less digits than its factorization.

221322434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110661219.

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

The square root of 221322434 is about 14876.9094236673. The cubic root of 221322434 is about 604.8882465534. Note that the first 3 decimals are identical.

Adding to 221322434 its reverse (434223122), we get a palindrome (655545556).

The spelling of 221322434 in words is "two hundred twenty-one million, three hundred twenty-two thousand, four hundred thirty-four".