133807231 has 8 divisors (see below), whose sum is σ = 137415600. Its totient is φ = 130215360.

The previous prime is 133807229. The next prime is 133807249. The reversal of 133807231 is 132708331.

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

It is a cyclic number.

It is not a de Polignac number, because 133807231 - 2¹ = 133807229 is a prime.

It is a super-2 number, since 2×133807231² = 35808750135774722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133807231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133807631) 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, 13285 + ... + 21073.

It is an arithmetic number, because the mean of its divisors is an integer number (17176950).

Almost surely, 2^133807231 is an apocalyptic number.

133807231 is a deficient number, since it is larger than the sum of its proper divisors (3608369).

133807231 is an equidigital number, since it uses as much as digits as its factorization.

133807231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 133807231 is about 11567.5075534879. The cubic root of 133807231 is about 511.4774930240.

The spelling of 133807231 in words is "one hundred thirty-three million, eight hundred seven thousand, two hundred thirty-one".