212313287 has 2 divisors, whose sum is σ = 212313288. Its totient is φ = 212313286.

The previous prime is 212313259. The next prime is 212313301. The reversal of 212313287 is 782313212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212313287 - 2¹⁶ = 212247751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212313487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156643 + 106156644.

It is an arithmetic number, because the mean of its divisors is an integer number (106156644).

Almost surely, 2^212313287 is an apocalyptic number.

212313287 is a deficient number, since it is larger than the sum of its proper divisors (1).

212313287 is an equidigital number, since it uses as much as digits as its factorization.

212313287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 212313287 is about 14570.9741266670. The cubic root of 212313287 is about 596.5667691991.

Adding to 212313287 its reverse (782313212), we get a palindrome (994626499).

The spelling of 212313287 in words is "two hundred twelve million, three hundred thirteen thousand, two hundred eighty-seven".