31443224232 has 128 divisors (see below), whose sum is σ = 90496823040. Its totient is φ = 8918138880.

The previous prime is 31443224221. The next prime is 31443224233. The reversal of 31443224232 is 23242234413.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31443224232.

It is not an unprimeable number, because it can be changed into a prime (31443224233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14549232 + ... + 14551392.

It is an arithmetic number, because the mean of its divisors is an integer number (707006430).

Almost surely, 2^31443224232 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 31443224232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45248411520).

31443224232 is an abundant number, since it is smaller than the sum of its proper divisors (59053598808).

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

31443224232 is a wasteful number, since it uses less digits than its factorization.

31443224232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2767 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

Adding to 31443224232 its reverse (23242234413), we get a palindrome (54685458645).

The spelling of 31443224232 in words is "thirty-one billion, four hundred forty-three million, two hundred twenty-four thousand, two hundred thirty-two".