133040231 has 4 divisors (see below), whose sum is σ = 133159200. Its totient is φ = 132921264.

The previous prime is 133040227. The next prime is 133040279. The reversal of 133040231 is 132040331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132040331 = 53 ⋅2491327.

It is a cyclic number.

It is not a de Polignac number, because 133040231 - 2² = 133040227 is a prime.

It is a super-2 number, since 2×133040231² = 35399406129066722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133040731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57791 + ... + 60048.

It is an arithmetic number, because the mean of its divisors is an integer number (33289800).

Almost surely, 2^133040231 is an apocalyptic number.

133040231 is a deficient number, since it is larger than the sum of its proper divisors (118969).

133040231 is a wasteful number, since it uses less digits than its factorization.

133040231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118968.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133040231 is about 11534.3066978471. The cubic root of 133040231 is about 510.4983351521.

Adding to 133040231 its reverse (132040331), we get a palindrome (265080562).

The spelling of 133040231 in words is "one hundred thirty-three million, forty thousand, two hundred thirty-one".