233223131231 has 4 divisors (see below), whose sum is σ = 241265308200. Its totient is φ = 225180954264.

The previous prime is 233223131191. The next prime is 233223131261. The reversal of 233223131231 is 132131322332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233223131231 is a prime.

It is a super-2 number, since 2×233223131231² (a number of 24 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 233223131231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233223131261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4021088441 + ... + 4021088498.

It is an arithmetic number, because the mean of its divisors is an integer number (60316327050).

Almost surely, 2^233223131231 is an apocalyptic number.

233223131231 is a deficient number, since it is larger than the sum of its proper divisors (8042176969).

233223131231 is an equidigital number, since it uses as much as digits as its factorization.

233223131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8042176968.

The product of its digits is 3888, while the sum is 26.

Adding to 233223131231 its reverse (132131322332), we get a palindrome (365354453563).

The spelling of 233223131231 in words is "two hundred thirty-three billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-one".