22011231 has 12 divisors (see below), whose sum is σ = 32259416. Its totient is φ = 13339920.

The previous prime is 22011221. The next prime is 22011239. The reversal of 22011231 is 13211022.

It is not a de Polignac number, because 22011231 - 2¹³ = 22003039 is a prime.

It is a super-2 number, since 2×22011231² = 968988580270722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29956 + ... + 30681.

Almost surely, 2^22011231 is an apocalyptic number.

22011231 is a deficient number, since it is larger than the sum of its proper divisors (10248185).

22011231 is a wasteful number, since it uses less digits than its factorization.

22011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60662 (or 60651 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22011231 is about 4691.6128356888. The cubic root of 22011231 is about 280.2516063233.

Adding to 22011231 its reverse (13211022), we get a palindrome (35222253).

The spelling of 22011231 in words is "twenty-two million, eleven thousand, two hundred thirty-one".