197213217 has 12 divisors (see below), whose sum is σ = 277520400. Its totient is φ = 124555032.

The previous prime is 197213207. The next prime is 197213249. The reversal of 197213217 is 712312791.

It is not a de Polignac number, because 197213217 - 2⁶ = 197213153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197213207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89967 + ... + 92132.

It is an arithmetic number, because the mean of its divisors is an integer number (23126700).

Almost surely, 2^197213217 is an apocalyptic number.

It is an amenable number.

197213217 is a deficient number, since it is larger than the sum of its proper divisors (80307183).

197213217 is a wasteful number, since it uses less digits than its factorization.

197213217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182140 (or 182121 counting only the distinct ones).

The product of its digits is 5292, while the sum is 33.

The square root of 197213217 is about 14043.2623346571. The cubic root of 197213217 is about 582.0746323205.

The spelling of 197213217 in words is "one hundred ninety-seven million, two hundred thirteen thousand, two hundred seventeen".