221332343231 has 8 divisors (see below), whose sum is σ = 222464189520. Its totient is φ = 220203202752.

The previous prime is 221332343201. The next prime is 221332343293. The reversal of 221332343231 is 132343233122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221332343231 - 2²² = 221328148927 is a prime.

It is a super-2 number, since 2×221332343231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221332343194 and 221332343203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221332343201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512336 + ... + 839733.

It is an arithmetic number, because the mean of its divisors is an integer number (27808023690).

Almost surely, 2^221332343231 is an apocalyptic number.

221332343231 is a deficient number, since it is larger than the sum of its proper divisors (1131846289).

221332343231 is a wasteful number, since it uses less digits than its factorization.

221332343231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352905.

The product of its digits is 15552, while the sum is 29.

Adding to 221332343231 its reverse (132343233122), we get a palindrome (353675576353).

The spelling of 221332343231 in words is "two hundred twenty-one billion, three hundred thirty-two million, three hundred forty-three thousand, two hundred thirty-one".