22312012 has 24 divisors (see below), whose sum is σ = 40524176. Its totient is φ = 10741248.

The previous prime is 22312009. The next prime is 22312019. The reversal of 22312012 is 21021322.

It is a super-3 number, since 3×22312012³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22311983 and 22312001.

It is not an unprimeable number, because it can be changed into a prime (22312019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11668 + ... + 13444.

Almost surely, 2^22312012 is an apocalyptic number.

It is an amenable number.

22312012 is a deficient number, since it is larger than the sum of its proper divisors (18212164).

22312012 is a wasteful number, since it uses less digits than its factorization.

22312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22312012 is about 4723.5592512426. The cubic root of 22312012 is about 281.5223710724.

Adding to 22312012 its reverse (21021322), we get a palindrome (43333334).

The spelling of 22312012 in words is "twenty-two million, three hundred twelve thousand, twelve".