231205233 has 32 divisors (see below), whose sum is σ = 358758400. Its totient is φ = 129724416.

The previous prime is 231205207. The next prime is 231205259. The reversal of 231205233 is 332502132.

It is an interprime number because it is at equal distance from previous prime (231205207) and next prime (231205259).

It is not a de Polignac number, because 231205233 - 2¹³ = 231197041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (231205283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300273 + ... + 301041.

It is an arithmetic number, because the mean of its divisors is an integer number (11211200).

Almost surely, 2^231205233 is an apocalyptic number.

It is an amenable number.

231205233 is a deficient number, since it is larger than the sum of its proper divisors (127553167).

231205233 is a wasteful number, since it uses less digits than its factorization.

231205233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 231205233 is about 15205.4343246091. The cubic root of 231205233 is about 613.7609026011.

Adding to 231205233 its reverse (332502132), we get a palindrome (563707365).

The spelling of 231205233 in words is "two hundred thirty-one million, two hundred five thousand, two hundred thirty-three".