22212331 has 4 divisors (see below), whose sum is σ = 22232232. Its totient is φ = 22192432.

The previous prime is 22212329. The next prime is 22212343. The reversal of 22212331 is 13321222.

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 22212331 - 2¹ = 22212329 is a prime.

It is a super-2 number, since 2×22212331² = 986775296907122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212301) 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, 8170 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (5558058).

Almost surely, 2^22212331 is an apocalyptic number.

22212331 is a deficient number, since it is larger than the sum of its proper divisors (19901).

22212331 is a wasteful number, since it uses less digits than its factorization.

22212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19900.

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

The square root of 22212331 is about 4712.9959685958. The cubic root of 22212331 is about 281.1025026772.

Adding to 22212331 its reverse (13321222), we get a palindrome (35533553).

The spelling of 22212331 in words is "twenty-two million, two hundred twelve thousand, three hundred thirty-one".