221340343231 has 32 divisors (see below), whose sum is σ = 267094955520. Its totient is φ = 179181849600.

The previous prime is 221340343229. The next prime is 221340343253. The reversal of 221340343231 is 132343043122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221340343231 - 2¹ = 221340343229 is a prime.

It is a super-2 number, since 2×221340343231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221340343231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221340340231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94306600 + ... + 94308946.

It is an arithmetic number, because the mean of its divisors is an integer number (8346717360).

Almost surely, 2^221340343231 is an apocalyptic number.

221340343231 is a deficient number, since it is larger than the sum of its proper divisors (45754612289).

221340343231 is a wasteful number, since it uses less digits than its factorization.

221340343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 221340343231 its reverse (132343043122), we get a palindrome (353683386353).

The spelling of 221340343231 in words is "two hundred twenty-one billion, three hundred forty million, three hundred forty-three thousand, two hundred thirty-one".