221244434 has 4 divisors (see below), whose sum is σ = 331866654. Its totient is φ = 110622216.

The previous prime is 221244431. The next prime is 221244461. The reversal of 221244434 is 434442122.

It is a happy number.

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., 208889209 + 12355225 = 14453^2 + 3515^2 .

It is not an unprimeable number, because it can be changed into a prime (221244431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55311107 + ... + 55311110.

Almost surely, 2^221244434 is an apocalyptic number.

221244434 is a deficient number, since it is larger than the sum of its proper divisors (110622220).

221244434 is a wasteful number, since it uses less digits than its factorization.

221244434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110622219.

The product of its digits is 6144, while the sum is 26.

The square root of 221244434 is about 14874.2876804236. The cubic root of 221244434 is about 604.8171785553.

Adding to 221244434 its reverse (434442122), we get a palindrome (655686556).

The spelling of 221244434 in words is "two hundred twenty-one million, two hundred forty-four thousand, four hundred thirty-four".