31322223 has 12 divisors (see below), whose sum is σ = 45391840. Its totient is φ = 20812896.

The previous prime is 31322201. The next prime is 31322261. The reversal of 31322223 is 32222313.

It is a happy number.

It is not a de Polignac number, because 31322223 - 2⁵ = 31322191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322196 and 31322205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2743 + ... + 8376.

Almost surely, 2^31322223 is an apocalyptic number.

31322223 is a deficient number, since it is larger than the sum of its proper divisors (14069617).

31322223 is a wasteful number, since it uses less digits than its factorization.

31322223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11438 (or 11435 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 31322223 is about 5596.6260371763. The cubic root of 31322223 is about 315.2227298525. Note that the first 3 decimals are identical.

Adding to 31322223 its reverse (32222313), we get a palindrome (63544536).

The spelling of 31322223 in words is "thirty-one million, three hundred twenty-two thousand, two hundred twenty-three".