231600197 has 4 divisors (see below), whose sum is σ = 245223756. Its totient is φ = 217976640.

The previous prime is 231600191. The next prime is 231600199. The reversal of 231600197 is 791006132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129367876 + 102232321 = 11374^2 + 10111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231600197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231600191) 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, 6811754 + ... + 6811787.

It is an arithmetic number, because the mean of its divisors is an integer number (61305939).

Almost surely, 2^231600197 is an apocalyptic number.

It is an amenable number.

231600197 is a deficient number, since it is larger than the sum of its proper divisors (13623559).

231600197 is a wasteful number, since it uses less digits than its factorization.

231600197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623558.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 231600197 is about 15218.4163762200. The cubic root of 231600197 is about 614.1101962451.

The spelling of 231600197 in words is "two hundred thirty-one million, six hundred thousand, one hundred ninety-seven".