221332042 has 8 divisors (see below), whose sum is σ = 332432100. Its totient is φ = 110521344.

The previous prime is 221332019. The next prime is 221332043. The reversal of 221332042 is 240233122.

It can be written as a sum of positive squares in 2 ways, for example, as 216354681 + 4977361 = 14709^2 + 2231^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221332043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70417 + ... + 73492.

Almost surely, 2^221332042 is an apocalyptic number.

221332042 is a deficient number, since it is larger than the sum of its proper divisors (111100058).

221332042 is a wasteful number, since it uses less digits than its factorization.

221332042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144680.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221332042 is about 14877.2323366949. The cubic root of 221332042 is about 604.8969995179.

Adding to 221332042 its reverse (240233122), we get a palindrome (461565164).

The spelling of 221332042 in words is "two hundred twenty-one million, three hundred thirty-two thousand, forty-two".