211495397 has 2 divisors, whose sum is σ = 211495398. Its totient is φ = 211495396.

The previous prime is 211495369. The next prime is 211495553. The reversal of 211495397 is 793594112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178329316 + 33166081 = 13354^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 211495397 - 2¹⁶ = 211429861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211492397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105747698 + 105747699.

It is an arithmetic number, because the mean of its divisors is an integer number (105747699).

Almost surely, 2^211495397 is an apocalyptic number.

It is an amenable number.

211495397 is a deficient number, since it is larger than the sum of its proper divisors (1).

211495397 is an equidigital number, since it uses as much as digits as its factorization.

211495397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 211495397 is about 14542.8813169880. The cubic root of 211495397 is about 595.7997362161.

The spelling of 211495397 in words is "two hundred eleven million, four hundred ninety-five thousand, three hundred ninety-seven".