13561001115 has 32 divisors (see below), whose sum is σ = 21926661120. Its totient is φ = 7156300416.

The previous prime is 13561001107. The next prime is 13561001137. The reversal of 13561001115 is 51110016531.

It is a happy number.

It is not a de Polignac number, because 13561001115 - 2³ = 13561001107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2303746 + ... + 2309624.

It is an arithmetic number, because the mean of its divisors is an integer number (685208160).

Almost surely, 2^13561001115 is an apocalyptic number.

13561001115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13561001115 is a deficient number, since it is larger than the sum of its proper divisors (8365660005).

13561001115 is a wasteful number, since it uses less digits than its factorization.

13561001115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7483.

The product of its (nonzero) digits is 450, while the sum is 24.

Adding to 13561001115 its reverse (51110016531), we get a palindrome (64671017646).

The spelling of 13561001115 in words is "thirteen billion, five hundred sixty-one million, one thousand, one hundred fifteen".