23131220333 has 8 divisors (see below), whose sum is σ = 25167356088. Its totient is φ = 21131771904.

The previous prime is 23131220317. The next prime is 23131220353. The reversal of 23131220333 is 33302213132.

It can be written as a sum of positive squares in 4 ways, for example, as 1997911204 + 21133309129 = 44698^2 + 145373^2 .

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 23131220333 - 2⁴ = 23131220317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23131220299 and 23131220308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131220353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9170516 + ... + 9173037.

It is an arithmetic number, because the mean of its divisors is an integer number (3145919511).

Almost surely, 2^23131220333 is an apocalyptic number.

It is an amenable number.

23131220333 is a deficient number, since it is larger than the sum of its proper divisors (2036135755).

23131220333 is a wasteful number, since it uses less digits than its factorization.

23131220333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343663.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 23131220333 its reverse (33302213132), we get a palindrome (56433433465).

The spelling of 23131220333 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty thousand, three hundred thirty-three".