13531125005 has 4 divisors (see below), whose sum is σ = 16237350012. Its totient is φ = 10824900000.

The previous prime is 13531124989. The next prime is 13531125007. The reversal of 13531125005 is 50052113531.

It is a happy number.

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 8322183076 + 5208941929 = 91226^2 + 72173^2 .

It is not a de Polignac number, because 13531125005 - 2⁴ = 13531124989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531125007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353112496 + ... + 1353112505.

It is an arithmetic number, because the mean of its divisors is an integer number (4059337503).

Almost surely, 2^13531125005 is an apocalyptic number.

It is an amenable number.

13531125005 is a deficient number, since it is larger than the sum of its proper divisors (2706225007).

13531125005 is an equidigital number, since it uses as much as digits as its factorization.

13531125005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706225006.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 13531125005 its reverse (50052113531), we get a palindrome (63583238536).

The spelling of 13531125005 in words is "thirteen billion, five hundred thirty-one million, one hundred twenty-five thousand, five".