212334431 has 2 divisors, whose sum is σ = 212334432. Its totient is φ = 212334430.

The previous prime is 212334427. The next prime is 212334487. The reversal of 212334431 is 134433212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212334431 - 2² = 212334427 is a prime.

It is a super-2 number, since 2×212334431² = 90171821176187522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212334397 and 212334406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212334631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106167215 + 106167216.

It is an arithmetic number, because the mean of its divisors is an integer number (106167216).

Almost surely, 2^212334431 is an apocalyptic number.

212334431 is a deficient number, since it is larger than the sum of its proper divisors (1).

212334431 is an equidigital number, since it uses as much as digits as its factorization.

212334431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 212334431 is about 14571.6996606436. The cubic root of 212334431 is about 596.5865723074.

Adding to 212334431 its reverse (134433212), we get a palindrome (346767643).

The spelling of 212334431 in words is "two hundred twelve million, three hundred thirty-four thousand, four hundred thirty-one".