221441434 has 8 divisors (see below), whose sum is σ = 335894580. Its totient is φ = 109476576.

The previous prime is 221441431. The next prime is 221441459. The reversal of 221441434 is 434144122.

It can be written as a sum of positive squares in 2 ways, for example, as 213014025 + 8427409 = 14595^2 + 2903^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221441399 and 221441408.

It is not an unprimeable number, because it can be changed into a prime (221441431) 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, 621849 + ... + 622204.

Almost surely, 2^221441434 is an apocalyptic number.

221441434 is a deficient number, since it is larger than the sum of its proper divisors (114453146).

221441434 is a wasteful number, since it uses less digits than its factorization.

221441434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244144.

The product of its digits is 3072, while the sum is 25.

The square root of 221441434 is about 14880.9083728111. The cubic root of 221441434 is about 604.9966386444.

Adding to 221441434 its reverse (434144122), we get a palindrome (655585556).

The spelling of 221441434 in words is "two hundred twenty-one million, four hundred forty-one thousand, four hundred thirty-four".