212130231 has 8 divisors (see below), whose sum is σ = 297726720. Its totient is φ = 133976952.

The previous prime is 212130229. The next prime is 212130271. The reversal of 212130231 is 132031212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212130231 - 2¹ = 212130229 is a prime.

It is a super-2 number, since 2×212130231² = 89998469808226722, 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 212130231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212130271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860735 + ... + 1860848.

It is an arithmetic number, because the mean of its divisors is an integer number (37215840).

Almost surely, 2^212130231 is an apocalyptic number.

212130231 is a deficient number, since it is larger than the sum of its proper divisors (85596489).

212130231 is a wasteful number, since it uses less digits than its factorization.

212130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721605.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212130231 is about 14564.6912428654. The cubic root of 212130231 is about 596.3952670940.

Adding to 212130231 its reverse (132031212), we get a palindrome (344161443).

The spelling of 212130231 in words is "two hundred twelve million, one hundred thirty thousand, two hundred thirty-one".