231223331 has 8 divisors (see below), whose sum is σ = 243810000. Its totient is φ = 218678400.

The previous prime is 231223297. The next prime is 231223373. The reversal of 231223331 is 133322132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231223331 - 2¹⁴ = 231206947 is a prime.

It is a super-2 number, since 2×231223331² = 106928457597471122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231223381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (30476250).

Almost surely, 2^231223331 is an apocalyptic number.

231223331 is a deficient number, since it is larger than the sum of its proper divisors (12586669).

231223331 is a wasteful number, since it uses less digits than its factorization.

231223331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20869.

The product of its digits is 648, while the sum is 20.

The square root of 231223331 is about 15206.0294291442. The cubic root of 231223331 is about 613.7769165913.

Adding to 231223331 its reverse (133322132), we get a palindrome (364545463).

The spelling of 231223331 in words is "two hundred thirty-one million, two hundred twenty-three thousand, three hundred thirty-one".