231222434320 has 80 divisors (see below), whose sum is σ = 553890642480. Its totient is φ = 89724157952.

The previous prime is 231222434273. The next prime is 231222434321. The reversal of 231222434320 is 23434222132.

It can be written as a sum of positive squares in 8 ways, for example, as 55228760064 + 175993674256 = 235008^2 + 419516^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (231222434321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70992 + ... + 683728.

It is an arithmetic number, because the mean of its divisors is an integer number (6923633031).

Almost surely, 2^231222434320 is an apocalyptic number.

231222434320 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 231222434320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276945321240).

231222434320 is an abundant number, since it is smaller than the sum of its proper divisors (322668208160).

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

231222434320 is a wasteful number, since it uses less digits than its factorization.

231222434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612892 (or 612886 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 231222434320 its reverse (23434222132), we get a palindrome (254656656452).

The spelling of 231222434320 in words is "two hundred thirty-one billion, two hundred twenty-two million, four hundred thirty-four thousand, three hundred twenty".