221032442 has 4 divisors (see below), whose sum is σ = 331548666. Its totient is φ = 110516220.

The previous prime is 221032439. The next prime is 221032447. The reversal of 221032442 is 244230122.

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., 201327721 + 19704721 = 14189^2 + 4439^2 .

It is not an unprimeable number, because it can be changed into a prime (221032447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55258109 + ... + 55258112.

Almost surely, 2^221032442 is an apocalyptic number.

221032442 is a deficient number, since it is larger than the sum of its proper divisors (110516224).

221032442 is a wasteful number, since it uses less digits than its factorization.

221032442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110516223.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 221032442 is about 14867.1598498166. The cubic root of 221032442 is about 604.6239422416.

Adding to 221032442 its reverse (244230122), we get a palindrome (465262564).

The spelling of 221032442 in words is "two hundred twenty-one million, thirty-two thousand, four hundred forty-two".