1305856231 has 2 divisors, whose sum is σ = 1305856232. Its totient is φ = 1305856230.

The previous prime is 1305856229. The next prime is 1305856247. The reversal of 1305856231 is 1326585031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1305856231 - 2¹ = 1305856229 is a prime.

It is a super-2 number, since 2×1305856231² = 3410520992083050722, which contains 22 as substring.

Together with 1305856229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305856261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652928115 + 652928116.

It is an arithmetic number, because the mean of its divisors is an integer number (652928116).

Almost surely, 2^1305856231 is an apocalyptic number.

1305856231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305856231 is an equidigital number, since it uses as much as digits as its factorization.

1305856231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1305856231 is about 36136.6328121478. The cubic root of 1305856231 is about 1093.0292613681.

The spelling of 1305856231 in words is "one billion, three hundred five million, eight hundred fifty-six thousand, two hundred thirty-one".