13531112505 has 32 divisors (see below), whose sum is σ = 24614747520. Its totient is φ = 7048762560.

The previous prime is 13531112503. The next prime is 13531112519. The reversal of 13531112505 is 50521113531.

13531112505 is a `hidden beast` number, since 1 + 3 + 531 + 1 + 125 + 0 + 5 = 666.

It is not a de Polignac number, because 13531112505 - 2¹ = 13531112503 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13531112503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1159666 + ... + 1171275.

It is an arithmetic number, because the mean of its divisors is an integer number (769210860).

Almost surely, 2^13531112505 is an apocalyptic number.

13531112505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13531112505 is a deficient number, since it is larger than the sum of its proper divisors (11083635015).

13531112505 is a wasteful number, since it uses less digits than its factorization.

13531112505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330998 (or 2330992 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The spelling of 13531112505 in words is "thirteen billion, five hundred thirty-one million, one hundred twelve thousand, five hundred five".