133402231 has 8 divisors (see below), whose sum is σ = 139935744. Its totient is φ = 126929880.

The previous prime is 133402229. The next prime is 133402253. The reversal of 133402231 is 132204331.

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 133402231 - 2¹ = 133402229 is a prime.

It is a super-2 number, since 2×133402231² = 35592310471554722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133402199 and 133402208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133402261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10791 + ... + 19576.

It is an arithmetic number, because the mean of its divisors is an integer number (17491968).

Almost surely, 2^133402231 is an apocalyptic number.

133402231 is a deficient number, since it is larger than the sum of its proper divisors (6533513).

133402231 is a wasteful number, since it uses less digits than its factorization.

133402231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30581.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133402231 is about 11549.9883549725. The cubic root of 133402231 is about 510.9609346632.

Adding to 133402231 its reverse (132204331), we get a palindrome (265606562).

The spelling of 133402231 in words is "one hundred thirty-three million, four hundred two thousand, two hundred thirty-one".