22007312 has 10 divisors (see below), whose sum is σ = 42639198. Its totient is φ = 11003648.

The previous prime is 22007287. The next prime is 22007329. The reversal of 22007312 is 21370022.

It can be written as a sum of positive squares in only one way, i.e., 17272336 + 4734976 = 4156^2 + 2176^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687713 + ... + 687744.

Almost surely, 2^22007312 is an apocalyptic number.

It is an amenable number.

22007312 is a deficient number, since it is larger than the sum of its proper divisors (20631886).

22007312 is a wasteful number, since it uses less digits than its factorization.

22007312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375465 (or 1375459 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 22007312 is about 4691.1951568870. The cubic root of 22007312 is about 280.2349728263.

Adding to 22007312 its reverse (21370022), we get a palindrome (43377334).

The spelling of 22007312 in words is "twenty-two million, seven thousand, three hundred twelve".