212424287 has 2 divisors, whose sum is σ = 212424288. Its totient is φ = 212424286.

The previous prime is 212424283. The next prime is 212424301. The reversal of 212424287 is 782424212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212424287 - 2² = 212424283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212424283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106212143 + 106212144.

It is an arithmetic number, because the mean of its divisors is an integer number (106212144).

Almost surely, 2^212424287 is an apocalyptic number.

212424287 is a deficient number, since it is larger than the sum of its proper divisors (1).

212424287 is an equidigital number, since it uses as much as digits as its factorization.

212424287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 32.

The square root of 212424287 is about 14574.7825712770. The cubic root of 212424287 is about 596.6707152367.

Adding to 212424287 its reverse (782424212), we get a palindrome (994848499).

The spelling of 212424287 in words is "two hundred twelve million, four hundred twenty-four thousand, two hundred eighty-seven".