22152012 has 12 divisors (see below), whose sum is σ = 51688056. Its totient is φ = 7384000.

The previous prime is 22152007. The next prime is 22152019. The reversal of 22152012 is 21025122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22151982 and 22152000.

It is not an unprimeable number, because it can be changed into a prime (22152019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922989 + ... + 923012.

It is an arithmetic number, because the mean of its divisors is an integer number (4307338).

Almost surely, 2^22152012 is an apocalyptic number.

It is an amenable number.

22152012 is an abundant number, since it is smaller than the sum of its proper divisors (29536044).

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

22152012 is a wasteful number, since it uses less digits than its factorization.

22152012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846008 (or 1846006 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 22152012 is about 4706.5923979032. The cubic root of 22152012 is about 280.8478214184.

Adding to 22152012 its reverse (21025122), we get a palindrome (43177134).

The spelling of 22152012 in words is "twenty-two million, one hundred fifty-two thousand, twelve".