231120233 has 4 divisors (see below), whose sum is σ = 232807380. Its totient is φ = 229433088.

The previous prime is 231120217. The next prime is 231120247. The reversal of 231120233 is 332021132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125708944 + 105411289 = 11212^2 + 10267^2 .

It is a cyclic number.

It is not a de Polignac number, because 231120233 - 2⁴ = 231120217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231120293) 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, 843368 + ... + 843641.

It is an arithmetic number, because the mean of its divisors is an integer number (58201845).

Almost surely, 2^231120233 is an apocalyptic number.

It is an amenable number.

231120233 is a deficient number, since it is larger than the sum of its proper divisors (1687147).

231120233 is a wasteful number, since it uses less digits than its factorization.

231120233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687146.

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

The square root of 231120233 is about 15202.6390143291. The cubic root of 231120233 is about 613.6856792875.

Adding to 231120233 its reverse (332021132), we get a palindrome (563141365).

The spelling of 231120233 in words is "two hundred thirty-one million, one hundred twenty thousand, two hundred thirty-three".