212215247 has 2 divisors, whose sum is σ = 212215248. Its totient is φ = 212215246.

The previous prime is 212215207. The next prime is 212215253. The reversal of 212215247 is 742512212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212215247 - 2⁸ = 212214991 is a prime.

It is a super-2 number, since 2×212215247² = 90070622118542018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212215207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106107623 + 106107624.

It is an arithmetic number, because the mean of its divisors is an integer number (106107624).

Almost surely, 2^212215247 is an apocalyptic number.

212215247 is a deficient number, since it is larger than the sum of its proper divisors (1).

212215247 is an equidigital number, since it uses as much as digits as its factorization.

212215247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 26.

The square root of 212215247 is about 14567.6095156343. The cubic root of 212215247 is about 596.4749294281.

Adding to 212215247 its reverse (742512212), we get a palindrome (954727459).

The spelling of 212215247 in words is "two hundred twelve million, two hundred fifteen thousand, two hundred forty-seven".