13215435500 has 24 divisors (see below), whose sum is σ = 28862512224. Its totient is φ = 5286174000.

The previous prime is 13215435479. The next prime is 13215435509. The reversal of 13215435500 is 553451231.

It is not an unprimeable number, because it can be changed into a prime (13215435509) 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, 13214936 + ... + 13215935.

It is an arithmetic number, because the mean of its divisors is an integer number (1202604676).

Almost surely, 2^13215435500 is an apocalyptic number.

13215435500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13215435500 is an abundant number, since it is smaller than the sum of its proper divisors (15647076724).

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

13215435500 is a wasteful number, since it uses less digits than its factorization.

13215435500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430890 (or 26430878 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 13215435500 its reverse (553451231), we get a palindrome (13768886731).

The spelling of 13215435500 in words is "thirteen billion, two hundred fifteen million, four hundred thirty-five thousand, five hundred".