266131 has 4 divisors (see below), whose sum is σ = 272664. Its totient is φ = 259600.

The previous prime is 266129. The next prime is 266137. The reversal of 266131 is 131662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131662 = 2 ⋅65831.

It is a cyclic number.

It is not a de Polignac number, because 266131 - 2¹ = 266129 is a prime.

It is a super-2 number, since 2×266131² = 141651418322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266099 and 266108.

It is not an unprimeable number, because it can be changed into a prime (266137) 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, 3205 + ... + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (68166).

2²⁶⁶¹³¹ is an apocalyptic number.

266131 is a deficient number, since it is larger than the sum of its proper divisors (6533).

266131 is an equidigital number, since it uses as much as digits as its factorization.

266131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532.

The product of its digits is 216, while the sum is 19.

The square root of 266131 is about 515.8788617495. The cubic root of 266131 is about 64.3228317101.

Adding to 266131 its reverse (131662), we get a palindrome (397793).

The spelling of 266131 in words is "two hundred sixty-six thousand, one hundred thirty-one".