221331043231 has 8 divisors (see below), whose sum is σ = 228971660400. Its totient is φ = 213690993600.

The previous prime is 221331043229. The next prime is 221331043259. The reversal of 221331043231 is 132340133122.

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 221331043231 - 2¹ = 221331043229 is a prime.

It is a super-2 number, since 2×221331043231² (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 = 221331043196 and 221331043205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331043331) 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, 745756 + ... + 999406.

It is an arithmetic number, because the mean of its divisors is an integer number (28621457550).

Almost surely, 2^221331043231 is an apocalyptic number.

221331043231 is a deficient number, since it is larger than the sum of its proper divisors (7640617169).

221331043231 is a wasteful number, since it uses less digits than its factorization.

221331043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283769.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 221331043231 its reverse (132340133122), we get a palindrome (353671176353).

The spelling of 221331043231 in words is "two hundred twenty-one billion, three hundred thirty-one million, forty-three thousand, two hundred thirty-one".