217525032973 has 2 divisors, whose sum is σ = 217525032974. Its totient is φ = 217525032972.

The previous prime is 217525032953. The next prime is 217525033021. The reversal of 217525032973 is 379230525712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210279107844 + 7245925129 = 458562^2 + 85123^2 .

It is a cyclic number.

It is not a de Polignac number, because 217525032973 - 2²⁵ = 217491478541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217525032913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108762516486 + 108762516487.

It is an arithmetic number, because the mean of its divisors is an integer number (108762516487).

Almost surely, 2^217525032973 is an apocalyptic number.

It is an amenable number.

217525032973 is a deficient number, since it is larger than the sum of its proper divisors (1).

217525032973 is an equidigital number, since it uses as much as digits as its factorization.

217525032973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 217525032973 in words is "two hundred seventeen billion, five hundred twenty-five million, thirty-two thousand, nine hundred seventy-three".