13431223240 has 32 divisors (see below), whose sum is σ = 30223730880. Its totient is φ = 5371870912.

The previous prime is 13431223237. The next prime is 13431223249. The reversal of 13431223240 is 4232213431.

It is not an unprimeable number, because it can be changed into a prime (13431223249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514749 + ... + 540211.

It is an arithmetic number, because the mean of its divisors is an integer number (944491590).

Almost surely, 2^13431223240 is an apocalyptic number.

13431223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13431223240 is an abundant number, since it is smaller than the sum of its proper divisors (16792507640).

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

13431223240 is a wasteful number, since it uses less digits than its factorization.

13431223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38661 (or 38657 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 13431223240 its reverse (4232213431), we get a palindrome (17663436671).

The spelling of 13431223240 in words is "thirteen billion, four hundred thirty-one million, two hundred twenty-three thousand, two hundred forty".