22033313231 has 4 divisors (see below), whose sum is σ = 22099879464. Its totient is φ = 21966747000.

The previous prime is 22033313227. The next prime is 22033313279. The reversal of 22033313231 is 13231333022.

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

It is a cyclic number.

It is not a de Polignac number, because 22033313231 - 2² = 22033313227 is a prime.

It is a super-2 number, since 2×22033313231² (a number of 21 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 = 22033313197 and 22033313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22033310231) 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, 33282620 + ... + 33283281.

It is an arithmetic number, because the mean of its divisors is an integer number (5524969866).

Almost surely, 2^22033313231 is an apocalyptic number.

22033313231 is a deficient number, since it is larger than the sum of its proper divisors (66566233).

22033313231 is an equidigital number, since it uses as much as digits as its factorization.

22033313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66566232.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 22033313231 its reverse (13231333022), we get a palindrome (35264646253).

The spelling of 22033313231 in words is "twenty-two billion, thirty-three million, three hundred thirteen thousand, two hundred thirty-one".