215064197 has 2 divisors, whose sum is σ = 215064198. Its totient is φ = 215064196.

The previous prime is 215064169. The next prime is 215064209. The reversal of 215064197 is 791460512.

215064197 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., 214300321 + 763876 = 14639^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 215064197 - 2¹⁴ = 215047813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215064137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107532098 + 107532099.

It is an arithmetic number, because the mean of its divisors is an integer number (107532099).

Almost surely, 2^215064197 is an apocalyptic number.

It is an amenable number.

215064197 is a deficient number, since it is larger than the sum of its proper divisors (1).

215064197 is an equidigital number, since it uses as much as digits as its factorization.

215064197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 215064197 is about 14665.0672347589. The cubic root of 215064197 is about 599.1322613952.

The spelling of 215064197 in words is "two hundred fifteen million, sixty-four thousand, one hundred ninety-seven".