212264287 has 2 divisors, whose sum is σ = 212264288. Its totient is φ = 212264286.

The previous prime is 212264281. The next prime is 212264317. The reversal of 212264287 is 782462212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212264287 - 2¹⁹ = 211739999 is a prime.

It is a super-2 number, since 2×212264287² = 90112255071236738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212264281) 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, 106132143 + 106132144.

It is an arithmetic number, because the mean of its divisors is an integer number (106132144).

Almost surely, 2^212264287 is an apocalyptic number.

212264287 is a deficient number, since it is larger than the sum of its proper divisors (1).

212264287 is an equidigital number, since it uses as much as digits as its factorization.

212264287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 212264287 is about 14569.2926046531. The cubic root of 212264287 is about 596.5208715837.

The spelling of 212264287 in words is "two hundred twelve million, two hundred sixty-four thousand, two hundred eighty-seven".