197131 has 4 divisors (see below), whose sum is σ = 215064. Its totient is φ = 179200.

The previous prime is 197123. The next prime is 197137. The reversal of 197131 is 131791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131791 = 11 ⋅11981.

It is a cyclic number.

It is not a de Polignac number, because 197131 - 2³ = 197123 is a prime.

It is a super-2 number, since 2×197131² = 77721262322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197137) 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, 8950 + ... + 8971.

It is an arithmetic number, because the mean of its divisors is an integer number (53766).

2¹⁹⁷¹³¹ is an apocalyptic number.

197131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197131 is a deficient number, since it is larger than the sum of its proper divisors (17933).

197131 is a wasteful number, since it uses less digits than its factorization.

197131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17932.

The product of its digits is 189, while the sum is 22.

The square root of 197131 is about 443.9943693337. The cubic root of 197131 is about 58.1993733277.

It can be divided in two parts, 1971 and 31, that added together give a palindrome (2002).

The spelling of 197131 in words is "one hundred ninety-seven thousand, one hundred thirty-one".