22213012 has 6 divisors (see below), whose sum is σ = 38872778. Its totient is φ = 11106504.

The previous prime is 22213007. The next prime is 22213049. The reversal of 22213012 is 21031222.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 2446096 = 4446^2 + 1564^2 .

It is a super-2 number, since 2×22213012² = 986835804224288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22212983 and 22213001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776623 + ... + 2776630.

Almost surely, 2^22213012 is an apocalyptic number.

It is an amenable number.

22213012 is a deficient number, since it is larger than the sum of its proper divisors (16659766).

22213012 is a wasteful number, since it uses less digits than its factorization.

22213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553257 (or 5553255 counting only the distinct ones).

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

The square root of 22213012 is about 4713.0682150803. The cubic root of 22213012 is about 281.1053753886.

Adding to 22213012 its reverse (21031222), we get a palindrome (43244234).

The spelling of 22213012 in words is "twenty-two million, two hundred thirteen thousand, twelve".