13531200505 has 4 divisors (see below), whose sum is σ = 16237440612. Its totient is φ = 10824960400.

The previous prime is 13531200497. The next prime is 13531200511. The reversal of 13531200505 is 50500213531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3908375289 + 9622825216 = 62517^2 + 98096^2 .

It is not a de Polignac number, because 13531200505 - 2³ = 13531200497 is a prime.

It is a super-3 number, since 3×13531200505³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13531200505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353120046 + ... + 1353120055.

It is an arithmetic number, because the mean of its divisors is an integer number (4059360153).

Almost surely, 2^13531200505 is an apocalyptic number.

It is an amenable number.

13531200505 is a deficient number, since it is larger than the sum of its proper divisors (2706240107).

13531200505 is an equidigital number, since it uses as much as digits as its factorization.

13531200505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706240106.

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 13531200505 in words is "thirteen billion, five hundred thirty-one million, two hundred thousand, five hundred five".