231200133 has 4 divisors (see below), whose sum is σ = 308266848. Its totient is φ = 154133420.

The previous prime is 231200131. The next prime is 231200231. The reversal of 231200133 is 331002132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231200133 - 2¹ = 231200131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231200131) 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, 38533353 + ... + 38533358.

It is an arithmetic number, because the mean of its divisors is an integer number (77066712).

Almost surely, 2^231200133 is an apocalyptic number.

It is an amenable number.

231200133 is a deficient number, since it is larger than the sum of its proper divisors (77066715).

231200133 is an equidigital number, since it uses as much as digits as its factorization.

231200133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77066714.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 231200133 is about 15205.2666204838. The cubic root of 231200133 is about 613.7563897222.

Adding to 231200133 its reverse (331002132), we get a palindrome (562202265).

The spelling of 231200133 in words is "two hundred thirty-one million, two hundred thousand, one hundred thirty-three".