212212457 has 2 divisors, whose sum is σ = 212212458. Its totient is φ = 212212456.

The previous prime is 212212423. The next prime is 212212489. The reversal of 212212457 is 754212212.

212212457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195328576 + 16883881 = 13976^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 212212457 - 2⁸ = 212212201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212212417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106228 + 106106229.

It is an arithmetic number, because the mean of its divisors is an integer number (106106229).

Almost surely, 2^212212457 is an apocalyptic number.

It is an amenable number.

212212457 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212457 is an equidigital number, since it uses as much as digits as its factorization.

212212457 is an evil number, because the sum of its binary digits is even.

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

The square root of 212212457 is about 14567.5137549274. The cubic root of 212212457 is about 596.4723154590.

Adding to 212212457 its reverse (754212212), we get a palindrome (966424669).

The spelling of 212212457 in words is "two hundred twelve million, two hundred twelve thousand, four hundred fifty-seven".