221433242 has 4 divisors (see below), whose sum is σ = 332149866. Its totient is φ = 110716620.

The previous prime is 221433227. The next prime is 221433257. The reversal of 221433242 is 242334122.

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

It is an interprime number because it is at equal distance from previous prime (221433227) and next prime (221433257).

It can be written as a sum of positive squares in only one way, i.e., 185204881 + 36228361 = 13609^2 + 6019^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55358309 + ... + 55358312.

Almost surely, 2^221433242 is an apocalyptic number.

221433242 is a deficient number, since it is larger than the sum of its proper divisors (110716624).

221433242 is a wasteful number, since it uses less digits than its factorization.

221433242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110716623.

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

The square root of 221433242 is about 14880.6331182514. The cubic root of 221433242 is about 604.9891781412.

Adding to 221433242 its reverse (242334122), we get a palindrome (463767364).

The spelling of 221433242 in words is "two hundred twenty-one million, four hundred thirty-three thousand, two hundred forty-two".