It is a nude number because it is divisible by every one of its digits.
It is an unprimeable number.
Almost surely, 223131122 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23131122 is a wasteful number, since it uses less digits than its factorization.
23131122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5462.
The square root of 23131122 is about 4809.4825085450. The cubic root of 23131122 is about 284.9260996451.
Adding to 23131122 its reverse (22113132), we get a palindrome (45244254).
The spelling of 23131122 in words is "twenty-three million, one hundred thirty-one thousand, one hundred twenty-two".