133073231 has 2 divisors, whose sum is σ = 133073232. Its totient is φ = 133073230.

The previous prime is 133073203. The next prime is 133073251. The reversal of 133073231 is 132370331.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (132370331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133073231 - 2²² = 128878927 is a prime.

It is a super-2 number, since 2×133073231² = 35416969617558722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133073197 and 133073206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133073251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66536615 + 66536616.

It is an arithmetic number, because the mean of its divisors is an integer number (66536616).

Almost surely, 2^133073231 is an apocalyptic number.

133073231 is a deficient number, since it is larger than the sum of its proper divisors (1).

133073231 is an equidigital number, since it uses as much as digits as its factorization.

133073231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 133073231 is about 11535.7371242587. The cubic root of 133073231 is about 510.5405405618.

The spelling of 133073231 in words is "one hundred thirty-three million, seventy-three thousand, two hundred thirty-one".