212131430 has 32 divisors (see below), whose sum is σ = 442373184. Its totient is φ = 71732736.

The previous prime is 212131421. The next prime is 212131453. The reversal of 212131430 is 34131212.

It is a junction number, because it is equal to n+sod(n) for n = 212131399 and 212131408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15647 + ... + 25866.

It is an arithmetic number, because the mean of its divisors is an integer number (13824162).

Almost surely, 2^212131430 is an apocalyptic number.

212131430 is an abundant number, since it is smaller than the sum of its proper divisors (230241754).

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

212131430 is a wasteful number, since it uses less digits than its factorization.

212131430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41600.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212131430 is about 14564.7324039956. The cubic root of 212131430 is about 596.3963907379.

Adding to 212131430 its reverse (34131212), we get a palindrome (246262642).

The spelling of 212131430 in words is "two hundred twelve million, one hundred thirty-one thousand, four hundred thirty".