135311525 has 12 divisors (see below), whose sum is σ = 170292672. Its totient is φ = 106632240.

The previous prime is 135311513. The next prime is 135311531. The reversal of 135311525 is 525113531.

It is a happy number.

It is not a de Polignac number, because 135311525 - 2¹⁸ = 135049381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135311494 and 135311503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38717 + ... + 42066.

It is an arithmetic number, because the mean of its divisors is an integer number (14191056).

Almost surely, 2^135311525 is an apocalyptic number.

It is an amenable number.

135311525 is a deficient number, since it is larger than the sum of its proper divisors (34981147).

135311525 is an equidigital number, since it uses as much as digits as its factorization.

135311525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80860 (or 80855 counting only the distinct ones).

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

The square root of 135311525 is about 11632.3482152143. The cubic root of 135311525 is about 513.3870736545.

The spelling of 135311525 in words is "one hundred thirty-five million, three hundred eleven thousand, five hundred twenty-five".