22312231 has 16 divisors (see below), whose sum is σ = 24018624. Its totient is φ = 20680704.

The previous prime is 22312229. The next prime is 22312259. The reversal of 22312231 is 13221322.

It is a cyclic number.

It is not a de Polignac number, because 22312231 - 2¹ = 22312229 is a prime.

It is a super-3 number, since 3×22312231³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22312261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162795 + ... + 162931.

It is an arithmetic number, because the mean of its divisors is an integer number (1501164).

Almost surely, 2^22312231 is an apocalyptic number.

22312231 is a deficient number, since it is larger than the sum of its proper divisors (1706393).

22312231 is a wasteful number, since it uses less digits than its factorization.

22312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

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

The square root of 22312231 is about 4723.5824328575. The cubic root of 22312231 is about 281.5232921488.

Adding to 22312231 its reverse (13221322), we get a palindrome (35533553).

Subtracting from 22312231 its reverse (13221322), we obtain a palindrome (9090909).

The spelling of 22312231 in words is "twenty-two million, three hundred twelve thousand, two hundred thirty-one".