22006312 has 8 divisors (see below), whose sum is σ = 41261850. Its totient is φ = 11003152.

The previous prime is 22006301. The next prime is 22006321. The reversal of 22006312 is 21360022.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 7214596 = 3846^2 + 2686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375387 + ... + 1375402.

Almost surely, 2^22006312 is an apocalyptic number.

It is an amenable number.

22006312 is a deficient number, since it is larger than the sum of its proper divisors (19255538).

22006312 is a wasteful number, since it uses less digits than its factorization.

22006312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750795 (or 2750791 counting only the distinct ones).

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

The square root of 22006312 is about 4691.0885730287. The cubic root of 22006312 is about 280.2307281883.

Adding to 22006312 its reverse (21360022), we get a palindrome (43366334).

The spelling of 22006312 in words is "twenty-two million, six thousand, three hundred twelve".