197151 has 4 divisors (see below), whose sum is σ = 262872. Its totient is φ = 131432.

The previous prime is 197147. The next prime is 197159. The reversal of 197151 is 151791.

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

It is a cyclic number.

It is not a de Polignac number, because 197151 - 2² = 197147 is a prime.

It is a D-number.

197151 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197159) 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, 32856 + ... + 32861.

It is an arithmetic number, because the mean of its divisors is an integer number (65718).

2¹⁹⁷¹⁵¹ is an apocalyptic number.

197151 is a deficient number, since it is larger than the sum of its proper divisors (65721).

197151 is an equidigital number, since it uses as much as digits as its factorization.

197151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65720.

The product of its digits is 315, while the sum is 24.

The square root of 197151 is about 444.0168915706. The cubic root of 197151 is about 58.2013414743.

The spelling of 197151 in words is "one hundred ninety-seven thousand, one hundred fifty-one".