221532342 has 24 divisors (see below), whose sum is σ = 445726008. Its totient is φ = 73402560.

The previous prime is 221532329. The next prime is 221532359. The reversal of 221532342 is 243235122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 657198 + ... + 657534.

It is an arithmetic number, because the mean of its divisors is an integer number (18571917).

Almost surely, 2^221532342 is an apocalyptic number.

221532342 is an abundant number, since it is smaller than the sum of its proper divisors (224193666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221532342 is an equidigital number, since it uses as much as digits as its factorization.

221532342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 673 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 221532342 is about 14883.9625772171. The cubic root of 221532342 is about 605.0794167541.

Adding to 221532342 its reverse (243235122), we get a palindrome (464767464).

The spelling of 221532342 in words is "two hundred twenty-one million, five hundred thirty-two thousand, three hundred forty-two".