231220330333133 has 16 divisors (see below), whose sum is σ = 255482489598336. Its totient is φ = 208143948418560.

The previous prime is 231220330333121. The next prime is 231220330333147. The reversal of 231220330333133 is 331333033022132.

It is a happy number.

It is not a de Polignac number, because 231220330333133 - 2⁸ = 231220330332877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231220330333133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220330333183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13108208 + ... + 25184633.

It is an arithmetic number, because the mean of its divisors is an integer number (15967655599896).

Almost surely, 2^{231220330333133} is an apocalyptic number.

231220330333133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

231220330333133 is a deficient number, since it is larger than the sum of its proper divisors (24262159265203).

231220330333133 is a wasteful number, since it uses less digits than its factorization.

231220330333133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38308324.

The product of its (nonzero) digits is 52488, while the sum is 32.

Adding to 231220330333133 its reverse (331333033022132), we get a palindrome (562553363355265).

The spelling of 231220330333133 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred thirty million, three hundred thirty-three thousand, one hundred thirty-three".