197161131 has 4 divisors (see below), whose sum is σ = 262881512. Its totient is φ = 131440752.

The previous prime is 197161127. The next prime is 197161141. The reversal of 197161131 is 131161791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131161791 = 3 ⋅43720597.

It is not a de Polignac number, because 197161131 - 2² = 197161127 is a prime.

It is a super-2 number, since 2×197161131² = 77745023154398322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197161141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32860186 + ... + 32860191.

It is an arithmetic number, because the mean of its divisors is an integer number (65720378).

Almost surely, 2^197161131 is an apocalyptic number.

197161131 is a deficient number, since it is larger than the sum of its proper divisors (65720381).

197161131 is an equidigital number, since it uses as much as digits as its factorization.

197161131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65720380.

The product of its digits is 1134, while the sum is 30.

The square root of 197161131 is about 14041.4077285719. The cubic root of 197161131 is about 582.0233838811.

The spelling of 197161131 in words is "one hundred ninety-seven million, one hundred sixty-one thousand, one hundred thirty-one".