233831136 has 144 divisors (see below), whose sum is σ = 779103360. Its totient is φ = 60721920.

The previous prime is 233831113. The next prime is 233831137. The reversal of 233831136 is 631138332.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233831137) 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 23 ways as a sum of consecutive naturals, for example, 49485 + ... + 54003.

It is an arithmetic number, because the mean of its divisors is an integer number (5410440).

Almost surely, 2^233831136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 233831136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389551680).

233831136 is an abundant number, since it is smaller than the sum of its proper divisors (545272224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

233831136 is a wasteful number, since it uses less digits than its factorization.

233831136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557 (or 4542 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

The square root of 233831136 is about 15291.5380521385. The cubic root of 233831136 is about 616.0757482608.

Adding to 233831136 its reverse (631138332), we get a palindrome (864969468).

The spelling of 233831136 in words is "two hundred thirty-three million, eight hundred thirty-one thousand, one hundred thirty-six".