212244340 has 96 divisors (see below), whose sum is σ = 558802944. Its totient is φ = 65784960.

The previous prime is 212244317. The next prime is 212244341. The reversal of 212244340 is 43442212.

It is a happy number.

It is a super-3 number, since 3×212244340³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212244341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435577 + ... + 436063.

It is an arithmetic number, because the mean of its divisors is an integer number (5820864).

Almost surely, 2^212244340 is an apocalyptic number.

212244340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212244340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279401472).

212244340 is an abundant number, since it is smaller than the sum of its proper divisors (346558604).

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

212244340 is a wasteful number, since it uses less digits than its factorization.

212244340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 212244340 is about 14568.6080323413. The cubic root of 212244340 is about 596.5021854845.

Adding to 212244340 its reverse (43442212), we get a palindrome (255686552).

The spelling of 212244340 in words is "two hundred twelve million, two hundred forty-four thousand, three hundred forty".