13222431240 has 128 divisors (see below), whose sum is σ = 41558814720. Its totient is φ = 3361248000.

The previous prime is 13222431221. The next prime is 13222431247. The reversal of 13222431240 is 4213422231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13222431240.

It is not an unprimeable number, because it can be changed into a prime (13222431247) 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, 222715 + ... + 275765.

It is an arithmetic number, because the mean of its divisors is an integer number (324678240).

Almost surely, 2^13222431240 is an apocalyptic number.

13222431240 is a gapful number since it is divisible by the number (10) 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 13222431240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20779407360).

13222431240 is an abundant number, since it is smaller than the sum of its proper divisors (28336383480).

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

13222431240 is a wasteful number, since it uses less digits than its factorization.

13222431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53163 (or 53159 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 13222431240 its reverse (4213422231), we get a palindrome (17435853471).

Subtracting from 13222431240 its reverse (4213422231), we obtain a palindrome (9009009009).

The spelling of 13222431240 in words is "thirteen billion, two hundred twenty-two million, four hundred thirty-one thousand, two hundred forty".