212422056 has 96 divisors (see below), whose sum is σ = 673958880. Its totient is φ = 55171200.

The previous prime is 212422051. The next prime is 212422057. The reversal of 212422056 is 650224212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (212422051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4726 + ... + 21146.

It is an arithmetic number, because the mean of its divisors is an integer number (7020405).

Almost surely, 2^212422056 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 212422056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336979440).

212422056 is an abundant number, since it is smaller than the sum of its proper divisors (461536824).

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

212422056 is a wasteful number, since it uses less digits than its factorization.

212422056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16455 (or 16444 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 212422056 is about 14574.7060347713. The cubic root of 212422056 is about 596.6686263716.

Adding to 212422056 its reverse (650224212), we get a palindrome (862646268).

The spelling of 212422056 in words is "two hundred twelve million, four hundred twenty-two thousand, fifty-six".