266231054650931 has 2 divisors, whose sum is σ = 266231054650932. Its totient is φ = 266231054650930.

The previous prime is 266231054650927. The next prime is 266231054650933. The reversal of 266231054650931 is 139056450132662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266231054650931 - 2² = 266231054650927 is a prime.

It is a super-2 number, since 2×266231054650931² (a number of 30 digits) contains 22 as substring.

Together with 266231054650933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266231054650933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133115527325465 + 133115527325466.

It is an arithmetic number, because the mean of its divisors is an integer number (133115527325466).

Almost surely, 2^{266231054650931} is an apocalyptic number.

266231054650931 is a deficient number, since it is larger than the sum of its proper divisors (1).

266231054650931 is an equidigital number, since it uses as much as digits as its factorization.

266231054650931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 266231054650931 in words is "two hundred sixty-six trillion, two hundred thirty-one billion, fifty-four million, six hundred fifty thousand, nine hundred thirty-one".