13213232240 has 40 divisors (see below), whose sum is σ = 33083903328. Its totient is φ = 4878731520.

The previous prime is 13213232231. The next prime is 13213232243. The reversal of 13213232240 is 4223231231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213232243) 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, 6351476 + ... + 6353555.

Almost surely, 2^13213232240 is an apocalyptic number.

13213232240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13213232240 is an abundant number, since it is smaller than the sum of its proper divisors (19870671088).

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

13213232240 is a wasteful number, since it uses less digits than its factorization.

13213232240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705057 (or 12705051 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 13213232240 its reverse (4223231231), we get a palindrome (17436463471).

The spelling of 13213232240 in words is "thirteen billion, two hundred thirteen million, two hundred thirty-two thousand, two hundred forty".