212343251 has 2 divisors, whose sum is σ = 212343252. Its totient is φ = 212343250.

The previous prime is 212343247. The next prime is 212343283. The reversal of 212343251 is 152343212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212343251 - 2² = 212343247 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212343151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106171625 + 106171626.

It is an arithmetic number, because the mean of its divisors is an integer number (106171626).

Almost surely, 2^212343251 is an apocalyptic number.

212343251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212343251 is an equidigital number, since it uses as much as digits as its factorization.

212343251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 212343251 is about 14572.0022989293. The cubic root of 212343251 is about 596.5948325798.

Adding to 212343251 its reverse (152343212), we get a palindrome (364686463).

The spelling of 212343251 in words is "two hundred twelve million, three hundred forty-three thousand, two hundred fifty-one".