231533223 has 4 divisors (see below), whose sum is σ = 308710968. Its totient is φ = 154355480.

The previous prime is 231533219. The next prime is 231533227. The reversal of 231533223 is 322335132.

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

It is an interprime number because it is at equal distance from previous prime (231533219) and next prime (231533227).

It is a cyclic number.

It is not a de Polignac number, because 231533223 - 2² = 231533219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231533193 and 231533202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533227) 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 3 ways as a sum of consecutive naturals, for example, 38588868 + ... + 38588873.

It is an arithmetic number, because the mean of its divisors is an integer number (77177742).

Almost surely, 2^231533223 is an apocalyptic number.

231533223 is a deficient number, since it is larger than the sum of its proper divisors (77177745).

231533223 is an equidigital number, since it uses as much as digits as its factorization.

231533223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77177744.

The product of its digits is 3240, while the sum is 24.

The square root of 231533223 is about 15216.2157910566. The cubic root of 231533223 is about 614.0509945374.

Adding to 231533223 its reverse (322335132), we get a palindrome (553868355).

The spelling of 231533223 in words is "two hundred thirty-one million, five hundred thirty-three thousand, two hundred twenty-three".