13581100 has 72 divisors (see below), whose sum is σ = 32859008. Its totient is φ = 4838400.

The previous prime is 13581097. The next prime is 13581103. The reversal of 13581100 is 118531.

It is an interprime number because it is at equal distance from previous prime (13581097) and next prime (13581103).

It is not an unprimeable number, because it can be changed into a prime (13581103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40132 + ... + 40468.

Almost surely, 2^13581100 is an apocalyptic number.

13581100 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 13581100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16429504).

13581100 is an abundant number, since it is smaller than the sum of its proper divisors (19277908).

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

13581100 is a wasteful number, since it uses less digits than its factorization.

13581100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 13581100 is about 3685.2544009878. The cubic root of 13581100 is about 238.5860144172.

Adding to 13581100 its reverse (118531), we get a palindrome (13699631).

The spelling of 13581100 in words is "thirteen million, five hundred eighty-one thousand, one hundred".