212228791 has 2 divisors, whose sum is σ = 212228792. Its totient is φ = 212228790.

The previous prime is 212228789. The next prime is 212228827. The reversal of 212228791 is 197822212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212228791 - 2¹ = 212228789 is a prime.

Together with 212228789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212228701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106114395 + 106114396.

It is an arithmetic number, because the mean of its divisors is an integer number (106114396).

Almost surely, 2^212228791 is an apocalyptic number.

212228791 is a deficient number, since it is larger than the sum of its proper divisors (1).

212228791 is an equidigital number, since it uses as much as digits as its factorization.

212228791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 212228791 is about 14568.0743751534. The cubic root of 212228791 is about 596.4876185644.

The spelling of 212228791 in words is "two hundred twelve million, two hundred twenty-eight thousand, seven hundred ninety-one".