221432342 has 16 divisors (see below), whose sum is σ = 343956240. Its totient is φ = 106788192.

The previous prime is 221432333. The next prime is 221432359. The reversal of 221432342 is 243234122.

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 7 ways as a sum of consecutive naturals, for example, 99413 + ... + 101615.

It is an arithmetic number, because the mean of its divisors is an integer number (21497265).

Almost surely, 2^221432342 is an apocalyptic number.

221432342 is a deficient number, since it is larger than the sum of its proper divisors (122523898).

221432342 is a wasteful number, since it uses less digits than its factorization.

221432342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

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

The square root of 221432342 is about 14880.6028775719. The cubic root of 221432342 is about 604.9883584947.

Adding to 221432342 its reverse (243234122), we get a palindrome (464666464).

The spelling of 221432342 in words is "two hundred twenty-one million, four hundred thirty-two thousand, three hundred forty-two".