231121422 has 48 divisors (see below), whose sum is σ = 573791712. Its totient is φ = 65862720.

The previous prime is 231121417. The next prime is 231121447. The reversal of 231121422 is 224121132.

It is a happy number.

231121422 is a `hidden beast` number, since 231 + 12 + 1 + 422 = 666.

It is a super-2 number, since 2×231121422² = 106834223414604168, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 231121395 and 231121404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50868 + ... + 55224.

It is an arithmetic number, because the mean of its divisors is an integer number (11953994).

Almost surely, 2^231121422 is an apocalyptic number.

231121422 is an abundant number, since it is smaller than the sum of its proper divisors (342670290).

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

231121422 is a wasteful number, since it uses less digits than its factorization.

231121422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793 (or 4790 counting only the distinct ones).

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

The square root of 231121422 is about 15202.6781193315. The cubic root of 231121422 is about 613.6867316561.

Adding to 231121422 its reverse (224121132), we get a palindrome (455242554).

The spelling of 231121422 in words is "two hundred thirty-one million, one hundred twenty-one thousand, four hundred twenty-two".