266042831 has 2 divisors, whose sum is σ = 266042832. Its totient is φ = 266042830.

The previous prime is 266042813. The next prime is 266042929. The reversal of 266042831 is 138240662.

Together with previous prime (266042813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266042831 - 2¹⁴ = 266026447 is a prime.

It is a super-2 number, since 2×266042831² = 141557575852989122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266042131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133021415 + 133021416.

It is an arithmetic number, because the mean of its divisors is an integer number (133021416).

Almost surely, 2^266042831 is an apocalyptic number.

266042831 is a deficient number, since it is larger than the sum of its proper divisors (1).

266042831 is an equidigital number, since it uses as much as digits as its factorization.

266042831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 266042831 is about 16310.8194459996. The cubic root of 266042831 is about 643.1572755698.

The spelling of 266042831 in words is "two hundred sixty-six million, forty-two thousand, eight hundred thirty-one".