342431221 has 32 divisors (see below), whose sum is σ = 412594560. Its totient is φ = 280627200.

The previous prime is 342431213. The next prime is 342431227. The reversal of 342431221 is 122134243.

It is a cyclic number.

It is not a de Polignac number, because 342431221 - 2³ = 342431213 is a prime.

It is a super-2 number, since 2×342431221² = 234518282231101682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 342431192 and 342431201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342431227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451975 + ... + 452731.

It is an arithmetic number, because the mean of its divisors is an integer number (12893580).

Almost surely, 2^342431221 is an apocalyptic number.

It is an amenable number.

342431221 is a deficient number, since it is larger than the sum of its proper divisors (70163339).

342431221 is a wasteful number, since it uses less digits than its factorization.

342431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885.

The product of its digits is 1152, while the sum is 22.

The square root of 342431221 is about 18504.8972166829. The cubic root of 342431221 is about 699.6128614407.

Adding to 342431221 its reverse (122134243), we get a palindrome (464565464).

The spelling of 342431221 in words is "three hundred forty-two million, four hundred thirty-one thousand, two hundred twenty-one".