163131 has 4 divisors (see below), whose sum is σ = 217512. Its totient is φ = 108752.

The previous prime is 163129. The next prime is 163147. The reversal of 163131 is 131361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131361 = 3 ⋅43787.

It is a cyclic number.

It is not a de Polignac number, because 163131 - 2¹ = 163129 is a prime.

It is a super-2 number, since 2×163131² = 53223446322, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 163131.

It is not an unprimeable number, because it can be changed into a prime (163151) 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, 27186 + ... + 27191.

It is an arithmetic number, because the mean of its divisors is an integer number (54378).

2¹⁶³¹³¹ is an apocalyptic number.

163131 is a deficient number, since it is larger than the sum of its proper divisors (54381).

163131 is an equidigital number, since it uses as much as digits as its factorization.

163131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54380.

The product of its digits is 54, while the sum is 15.

The square root of 163131 is about 403.8947882803. The cubic root of 163131 is about 54.6401856343.

Adding to 163131 its reverse (131361), we get a palindrome (294492).

The spelling of 163131 in words is "one hundred sixty-three thousand, one hundred thirty-one".