212130431 has 2 divisors, whose sum is σ = 212130432. Its totient is φ = 212130430.

The previous prime is 212130397. The next prime is 212130439. The reversal of 212130431 is 134031212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212130431 - 2¹⁴ = 212114047 is a prime.

It is a super-2 number, since 2×212130431² = 89998639512491522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212130439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106065215 + 106065216.

It is an arithmetic number, because the mean of its divisors is an integer number (106065216).

Almost surely, 2^212130431 is an apocalyptic number.

212130431 is a deficient number, since it is larger than the sum of its proper divisors (1).

212130431 is an equidigital number, since it uses as much as digits as its factorization.

212130431 is an odious number, because the sum of its binary digits is odd.

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

The square root of 212130431 is about 14564.6981087834. The cubic root of 212130431 is about 596.3954545244.

Adding to 212130431 its reverse (134031212), we get a palindrome (346161643).

The spelling of 212130431 in words is "two hundred twelve million, one hundred thirty thousand, four hundred thirty-one".