231122412 has 144 divisors (see below), whose sum is σ = 648333504. Its totient is φ = 69120000.

The previous prime is 231122407. The next prime is 231122417. The reversal of 231122412 is 214221132.

It is a happy number.

231122412 is a `hidden beast` number, since 231 + 1 + 22 + 412 = 666.

It is an interprime number because it is at equal distance from previous prime (231122407) and next prime (231122417).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (231122417) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1530537 + ... + 1530687.

It is an arithmetic number, because the mean of its divisors is an integer number (4502316).

Almost surely, 2^231122412 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 231122412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324166752).

231122412 is an abundant number, since it is smaller than the sum of its proper divisors (417211092).

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

231122412 is a wasteful number, since it uses less digits than its factorization.

231122412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 275 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 231122412 is about 15202.7106793493. The cubic root of 231122412 is about 613.6876078896.

Adding to 231122412 its reverse (214221132), we get a palindrome (445343544).

The spelling of 231122412 in words is "two hundred thirty-one million, one hundred twenty-two thousand, four hundred twelve".