217532190201 has 4 divisors (see below), whose sum is σ = 290042920272. Its totient is φ = 145021460132.

The previous prime is 217532190151. The next prime is 217532190223. The reversal of 217532190201 is 102091235712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217532190201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217532190251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36255365031 + ... + 36255365036.

It is an arithmetic number, because the mean of its divisors is an integer number (72510730068).

Almost surely, 2^217532190201 is an apocalyptic number.

It is an amenable number.

217532190201 is a deficient number, since it is larger than the sum of its proper divisors (72510730071).

217532190201 is an equidigital number, since it uses as much as digits as its factorization.

217532190201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72510730070.

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 217532190201 in words is "two hundred seventeen billion, five hundred thirty-two million, one hundred ninety thousand, two hundred one".