133345831 has 2 divisors, whose sum is σ = 133345832. Its totient is φ = 133345830.

The previous prime is 133345813. The next prime is 133345843. The reversal of 133345831 is 138543331.

Together with previous prime (133345813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133345831 - 2⁹ = 133345319 is a prime.

It is a super-2 number, since 2×133345831² = 35562221290161122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133345793 and 133345802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133345801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66672915 + 66672916.

It is an arithmetic number, because the mean of its divisors is an integer number (66672916).

Almost surely, 2^133345831 is an apocalyptic number.

133345831 is a deficient number, since it is larger than the sum of its proper divisors (1).

133345831 is an equidigital number, since it uses as much as digits as its factorization.

133345831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 133345831 is about 11547.5465359530. The cubic root of 133345831 is about 510.8889162301. Note that the first 3 decimals are identical.

The spelling of 133345831 in words is "one hundred thirty-three million, three hundred forty-five thousand, eight hundred thirty-one".