211975397207 has 16 divisors (see below), whose sum is σ = 255129020160. Its totient is φ = 172048707072.

The previous prime is 211975397173. The next prime is 211975397219. The reversal of 211975397207 is 702793579112.

It is a cyclic number.

It is not a de Polignac number, because 211975397207 - 2⁶ = 211975397143 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211975397297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96113 + ... + 658170.

It is an arithmetic number, because the mean of its divisors is an integer number (15945563760).

Almost surely, 2^211975397207 is an apocalyptic number.

211975397207 is a deficient number, since it is larger than the sum of its proper divisors (43153622953).

211975397207 is a wasteful number, since it uses less digits than its factorization.

211975397207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756422.

The product of its (nonzero) digits is 1666980, while the sum is 53.

The spelling of 211975397207 in words is "two hundred eleven billion, nine hundred seventy-five million, three hundred ninety-seven thousand, two hundred seven".