133306243 has 8 divisors (see below), whose sum is σ = 157603680. Its totient is φ = 110322240.

The previous prime is 133306219. The next prime is 133306267. The reversal of 133306243 is 342603331.

It is an interprime number because it is at equal distance from previous prime (133306219) and next prime (133306267).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-133306243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133306543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328138 + ... + 328543.

It is an arithmetic number, because the mean of its divisors is an integer number (19700460).

Almost surely, 2^133306243 is an apocalyptic number.

133306243 is a deficient number, since it is larger than the sum of its proper divisors (24297437).

133306243 is an equidigital number, since it uses as much as digits as its factorization.

133306243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656717.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 133306243 is about 11545.8322783591. The cubic root of 133306243 is about 510.8383532889.

Adding to 133306243 its reverse (342603331), we get a palindrome (475909574).

The spelling of 133306243 in words is "one hundred thirty-three million, three hundred six thousand, two hundred forty-three".