22212512 has 48 divisors (see below), whose sum is σ = 50948352. Its totient is φ = 9335040.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212512 is 21521222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10937 + ... + 12807.

It is an arithmetic number, because the mean of its divisors is an integer number (1061424).

Almost surely, 2^22212512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22212512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25474176).

22212512 is an abundant number, since it is smaller than the sum of its proper divisors (28735840).

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

22212512 is a wasteful number, since it uses less digits than its factorization.

22212512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1933 counting only the distinct ones).

The product of its digits is 160, while the sum is 17.

The square root of 22212512 is about 4713.0151707797. The cubic root of 22212512 is about 281.1032662083.

Adding to 22212512 its reverse (21521222), we get a palindrome (43733734).

The spelling of 22212512 in words is "twenty-two million, two hundred twelve thousand, five hundred twelve".