22312213 has 32 divisors (see below), whose sum is σ = 29767680. Its totient is φ = 16200000.

The previous prime is 22312193. The next prime is 22312217. The reversal of 22312213 is 31221322.

It is a cyclic number.

It is not a de Polignac number, because 22312213 - 2⁵ = 22312181 is a prime.

It is a super-3 number, since 3×22312213³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147688 + ... + 147838.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^22312213 is an apocalyptic number.

It is an amenable number.

22312213 is a deficient number, since it is larger than the sum of its proper divisors (7455467).

22312213 is a wasteful number, since it uses less digits than its factorization.

22312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289.

The product of its digits is 144, while the sum is 16.

The square root of 22312213 is about 4723.5805275236. The cubic root of 22312213 is about 281.5232164441.

Adding to 22312213 its reverse (31221322), we get a palindrome (53533535).

It can be divided in two parts, 2231 and 2213, that added together give a palindrome (4444).

The spelling of 22312213 in words is "twenty-two million, three hundred twelve thousand, two hundred thirteen".