231222033 has 42 divisors (see below), whose sum is σ = 403336674. Its totient is φ = 132106464.

The previous prime is 231222031. The next prime is 231222053. The reversal of 231222033 is 330222132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 165173904 + 66048129 = 12852^2 + 8127^2 .

It is not a de Polignac number, because 231222033 - 2¹ = 231222031 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231221997 and 231222015.

It is not an unprimeable number, because it can be changed into a prime (231222031) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 32485 + ... + 38957.

Almost surely, 2^231222033 is an apocalyptic number.

It is an amenable number.

231222033 is a deficient number, since it is larger than the sum of its proper divisors (172114641).

231222033 is an frugal number, since it uses more digits than its factorization.

231222033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505 (or 6483 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231222033 is about 15205.9867486461. The cubic root of 231222033 is about 613.7757680856.

Adding to 231222033 its reverse (330222132), we get a palindrome (561444165).

Subtracting 231222033 from its reverse (330222132), we obtain a palindrome (99000099).

The spelling of 231222033 in words is "two hundred thirty-one million, two hundred twenty-two thousand, thirty-three".