212040231 has 16 divisors (see below), whose sum is σ = 305159904. Its totient is φ = 130189824.

The previous prime is 212040223. The next prime is 212040263. The reversal of 212040231 is 132040212.

It is not a de Polignac number, because 212040231 - 2³ = 212040223 is a prime.

It is a super-2 number, since 2×212040231² = 89922119125066722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212040231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212040221) 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, 11875 + ... + 23771.

It is an arithmetic number, because the mean of its divisors is an integer number (19072494).

Almost surely, 2^212040231 is an apocalyptic number.

212040231 is a deficient number, since it is larger than the sum of its proper divisors (93119673).

212040231 is a wasteful number, since it uses less digits than its factorization.

212040231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12370.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212040231 is about 14561.6012512361. The cubic root of 212040231 is about 596.3109114185.

Adding to 212040231 its reverse (132040212), we get a palindrome (344080443).

The spelling of 212040231 in words is "two hundred twelve million, forty thousand, two hundred thirty-one".