233131213422 has 128 divisors (see below), whose sum is σ = 562241433600. Its totient is φ = 71406137088.

The previous prime is 233131213349. The next prime is 233131213423. The reversal of 233131213422 is 224312131332.

233131213422 is a `hidden beast` number, since 2 + 3 + 3 + 1 + 312 + 1 + 342 + 2 = 666.

233131213422 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×233131213422² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131213423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3598258 + ... + 3662474.

It is an arithmetic number, because the mean of its divisors is an integer number (4392511200).

Almost surely, 2^233131213422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 233131213422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281120716800).

233131213422 is an abundant number, since it is smaller than the sum of its proper divisors (329110220178).

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

233131213422 is a wasteful number, since it uses less digits than its factorization.

233131213422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64367 (or 64361 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 233131213422 its reverse (224312131332), we get a palindrome (457443344754).

The spelling of 233131213422 in words is "two hundred thirty-three billion, one hundred thirty-one million, two hundred thirteen thousand, four hundred twenty-two".