231133001 has 4 divisors (see below), whose sum is σ = 252145104. Its totient is φ = 210120900.

The previous prime is 231132977. The next prime is 231133009. The reversal of 231133001 is 100331132.

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 not a de Polignac number, because 231133001 - 2²⁶ = 164024137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231133009) 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, 10506035 + ... + 10506056.

It is an arithmetic number, because the mean of its divisors is an integer number (63036276).

Almost surely, 2^231133001 is an apocalyptic number.

It is an amenable number.

231133001 is a deficient number, since it is larger than the sum of its proper divisors (21012103).

231133001 is a wasteful number, since it uses less digits than its factorization.

231133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012102.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 231133001 is about 15203.0589356221. The cubic root of 231133001 is about 613.6969798912.

Adding to 231133001 its reverse (100331132), we get a palindrome (331464133).

The spelling of 231133001 in words is "two hundred thirty-one million, one hundred thirty-three thousand, one".