212331340 has 48 divisors (see below), whose sum is σ = 481515552. Its totient is φ = 78183936.

The previous prime is 212331323. The next prime is 212331349. The reversal of 212331340 is 43133212.

It is not an unprimeable number, because it can be changed into a prime (212331349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117927 + ... + 119713.

It is an arithmetic number, because the mean of its divisors is an integer number (10031574).

Almost surely, 2^212331340 is an apocalyptic number.

212331340 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 212331340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240757776).

212331340 is an abundant number, since it is smaller than the sum of its proper divisors (269184212).

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

212331340 is a wasteful number, since it uses less digits than its factorization.

212331340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 212331340 is about 14571.5935985053. The cubic root of 212331340 is about 596.5836774118.

Adding to 212331340 its reverse (43133212), we get a palindrome (255464552).

The spelling of 212331340 in words is "two hundred twelve million, three hundred thirty-one thousand, three hundred forty".