212397612 has 72 divisors (see below), whose sum is σ = 582430464. Its totient is φ = 59012928.

The previous prime is 212397611. The next prime is 212397623. The reversal of 212397612 is 216793212.

212397612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212397612² = 90225491166605088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212397611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114073 + ... + 115919.

It is an arithmetic number, because the mean of its divisors is an integer number (8089312).

Almost surely, 2^212397612 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 212397612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291215232).

212397612 is an abundant number, since it is smaller than the sum of its proper divisors (370032852).

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

212397612 is a wasteful number, since it uses less digits than its factorization.

212397612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935 (or 1896 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 212397612 is about 14573.8674345556. The cubic root of 212397612 is about 596.6457387178.

The spelling of 212397612 in words is "two hundred twelve million, three hundred ninety-seven thousand, six hundred twelve".