212312140 has 12 divisors (see below), whose sum is σ = 445855536. Its totient is φ = 84924848.

The previous prime is 212312129. The next prime is 212312141. The reversal of 212312140 is 41213212.

It is not an unprimeable number, because it can be changed into a prime (212312141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5307784 + ... + 5307823.

It is an arithmetic number, because the mean of its divisors is an integer number (37154628).

Almost surely, 2^212312140 is an apocalyptic number.

212312140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212312140 is an abundant number, since it is smaller than the sum of its proper divisors (233543396).

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

212312140 is a wasteful number, since it uses less digits than its factorization.

212312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10615616 (or 10615614 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 212312140 is about 14570.9347675432. The cubic root of 212312140 is about 596.5656949009.

Adding to 212312140 its reverse (41213212), we get a palindrome (253525352).

The spelling of 212312140 in words is "two hundred twelve million, three hundred twelve thousand, one hundred forty".