195397331 has 4 divisors (see below), whose sum is σ = 202135200. Its totient is φ = 188659464.

The previous prime is 195397313. The next prime is 195397339. The reversal of 195397331 is 133793591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195397331 is a prime.

It is a super-2 number, since 2×195397331² = 76360233923847122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195397339) 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, 3368891 + ... + 3368948.

It is an arithmetic number, because the mean of its divisors is an integer number (50533800).

Almost surely, 2^195397331 is an apocalyptic number.

195397331 is a deficient number, since it is larger than the sum of its proper divisors (6737869).

195397331 is an equidigital number, since it uses as much as digits as its factorization.

195397331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737868.

The product of its digits is 76545, while the sum is 41.

The square root of 195397331 is about 13978.4595360147. The cubic root of 195397331 is about 580.2825921759.

The spelling of 195397331 in words is "one hundred ninety-five million, three hundred ninety-seven thousand, three hundred thirty-one".