266301631 has 2 divisors, whose sum is σ = 266301632. Its totient is φ = 266301630.

The previous prime is 266301611. The next prime is 266301649. The reversal of 266301631 is 136103662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266301631 is a prime.

It is a super-2 number, since 2×266301631² = 141833117346520322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266301631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266301611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133150815 + 133150816.

It is an arithmetic number, because the mean of its divisors is an integer number (133150816).

Almost surely, 2^266301631 is an apocalyptic number.

266301631 is a deficient number, since it is larger than the sum of its proper divisors (1).

266301631 is an equidigital number, since it uses as much as digits as its factorization.

266301631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 266301631 is about 16318.7509019532. The cubic root of 266301631 is about 643.3657572378.

The spelling of 266301631 in words is "two hundred sixty-six million, three hundred one thousand, six hundred thirty-one".