266431 has 8 divisors (see below), whose sum is σ = 296784. Its totient is φ = 237120.

The previous prime is 266417. The next prime is 266447. The reversal of 266431 is 134662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266431 - 2¹⁵ = 233663 is a prime.

It is a super-2 number, since 2×266431² = 141970955522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (37098).

2²⁶⁶⁴³¹ is an apocalyptic number.

266431 is a deficient number, since it is larger than the sum of its proper divisors (30353).

266431 is a wasteful number, since it uses less digits than its factorization.

266431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its digits is 864, while the sum is 22.

The square root of 266431 is about 516.1695457890. The cubic root of 266431 is about 64.3469922466.

Subtracting from 266431 its reverse (134662), we obtain a square (131769 = 363²).

The spelling of 266431 in words is "two hundred sixty-six thousand, four hundred thirty-one".