231122230320 has 160 divisors (see below), whose sum is σ = 742955037120. Its totient is φ = 59365232640.

The previous prime is 231122230319. The next prime is 231122230331. The reversal of 231122230320 is 23032221132.

It is a happy number.

It is a super-2 number, since 2×231122230320² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2890722 + ... + 2969598.

It is an arithmetic number, because the mean of its divisors is an integer number (4643468982).

Almost surely, 2^231122230320 is an apocalyptic number.

231122230320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231122230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371477518560).

231122230320 is an abundant number, since it is smaller than the sum of its proper divisors (511832806800).

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

231122230320 is a wasteful number, since it uses less digits than its factorization.

231122230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79343 (or 79337 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231122230320 its reverse (23032221132), we get a palindrome (254154451452).

The spelling of 231122230320 in words is "two hundred thirty-one billion, one hundred twenty-two million, two hundred thirty thousand, three hundred twenty".