13215025540 has 48 divisors (see below), whose sum is σ = 29222424000. Its totient is φ = 5006040192.

The previous prime is 13215025519. The next prime is 13215025547. The reversal of 13215025540 is 4552051231.

It is a junction number, because it is equal to n+sod(n) for n = 13215025499 and 13215025508.

It is not an unprimeable number, because it can be changed into a prime (13215025547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712611 + ... + 1720309.

It is an arithmetic number, because the mean of its divisors is an integer number (608800500).

Almost surely, 2^13215025540 is an apocalyptic number.

13215025540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13215025540 is an abundant number, since it is smaller than the sum of its proper divisors (16007398460).

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

13215025540 is a wasteful number, since it uses less digits than its factorization.

13215025540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12244 (or 12242 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 13215025540 its reverse (4552051231), we get a palindrome (17767076771).

The spelling of 13215025540 in words is "thirteen billion, two hundred fifteen million, twenty-five thousand, five hundred forty".