22231812 has 24 divisors (see below), whose sum is σ = 52256736. Its totient is φ = 7355968.

The previous prime is 22231789. The next prime is 22231861. The reversal of 22231812 is 21813222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 5118 + ... + 8405.

It is an arithmetic number, because the mean of its divisors is an integer number (2177364).

Almost surely, 2^22231812 is an apocalyptic number.

It is an amenable number.

22231812 is an abundant number, since it is smaller than the sum of its proper divisors (30024924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22231812 is a wasteful number, since it uses less digits than its factorization.

22231812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13667 (or 13665 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 22231812 is about 4715.0622477333. The cubic root of 22231812 is about 281.1846576104.

The spelling of 22231812 in words is "twenty-two million, two hundred thirty-one thousand, eight hundred twelve".