13215234240 has 672 divisors, whose sum is σ = 53820486720. Its totient is φ = 3057647616.

The previous prime is 13215234233. The next prime is 13215234251. The reversal of 13215234240 is 4243251231.

13215234240 is a `hidden beast` number, since 1 + 3 + 215 + 23 + 424 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17184576 + ... + 17185344.

It is an arithmetic number, because the mean of its divisors is an integer number (80090010).

Almost surely, 2^13215234240 is an apocalyptic number.

13215234240 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 13215234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26910243360).

13215234240 is an abundant number, since it is smaller than the sum of its proper divisors (40605252480).

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

13215234240 is a wasteful number, since it uses less digits than its factorization.

13215234240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 13215234240 its reverse (4243251231), we get a palindrome (17458485471).

The spelling of 13215234240 in words is "thirteen billion, two hundred fifteen million, two hundred thirty-four thousand, two hundred forty".