135525532013 has 4 divisors (see below), whose sum is σ = 137747262108. Its totient is φ = 133303801920.

The previous prime is 135525532007. The next prime is 135525532019. The reversal of 135525532013 is 310235525531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310235525531 = 1451 ⋅213808081.

It is an interprime number because it is at equal distance from previous prime (135525532007) and next prime (135525532019).

It can be written as a sum of positive squares in 2 ways, for example, as 3194736484 + 132330795529 = 56522^2 + 363773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135525532013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135525532019) 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, 1110864956 + ... + 1110865077.

It is an arithmetic number, because the mean of its divisors is an integer number (34436815527).

Almost surely, 2^135525532013 is an apocalyptic number.

It is an amenable number.

135525532013 is a deficient number, since it is larger than the sum of its proper divisors (2221730095).

135525532013 is an equidigital number, since it uses as much as digits as its factorization.

135525532013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221730094.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 135525532013 in words is "one hundred thirty-five billion, five hundred twenty-five million, five hundred thirty-two thousand, thirteen".