22311213 has 4 divisors (see below), whose sum is σ = 29748288. Its totient is φ = 14874140.

The previous prime is 22311199. The next prime is 22311271. The reversal of 22311213 is 31211322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22311213 - 2⁸ = 22310957 is a prime.

It is a super-3 number, since 3×22311213³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22311192 and 22311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22311713) 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, 3718533 + ... + 3718538.

It is an arithmetic number, because the mean of its divisors is an integer number (7437072).

Almost surely, 2^22311213 is an apocalyptic number.

It is an amenable number.

22311213 is a deficient number, since it is larger than the sum of its proper divisors (7437075).

22311213 is an equidigital number, since it uses as much as digits as its factorization.

22311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437074.

The product of its digits is 72, while the sum is 15.

The square root of 22311213 is about 4723.4746744319. The cubic root of 22311213 is about 281.5190105648.

Adding to 22311213 its reverse (31211322), we get a palindrome (53522535).

The spelling of 22311213 in words is "twenty-two million, three hundred eleven thousand, two hundred thirteen".