22100812 has 6 divisors (see below), whose sum is σ = 38676428. Its totient is φ = 11050404.

The previous prime is 22100807. The next prime is 22100851. The reversal of 22100812 is 21800122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762598 + ... + 2762605.

Almost surely, 2^22100812 is an apocalyptic number.

It is an amenable number.

22100812 is a deficient number, since it is larger than the sum of its proper divisors (16575616).

22100812 is a wasteful number, since it uses less digits than its factorization.

22100812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525207 (or 5525205 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 22100812 is about 4701.1500720568. The cubic root of 22100812 is about 280.6312797473.

Adding to 22100812 its reverse (21800122), we get a palindrome (43900934).

The spelling of 22100812 in words is "twenty-two million, one hundred thousand, eight hundred twelve".