135603313531 has 16 divisors (see below), whose sum is σ = 158777196480. Its totient is φ = 113380715520.

The previous prime is 135603313529. The next prime is 135603313579. The reversal of 135603313531 is 135313306531.

It is a cyclic number.

It is not a de Polignac number, because 135603313531 - 2¹ = 135603313529 is a prime.

It is a super-2 number, since 2×135603313531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135603313231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2327205 + ... + 2384761.

It is an arithmetic number, because the mean of its divisors is an integer number (9923574780).

Almost surely, 2^135603313531 is an apocalyptic number.

135603313531 is a deficient number, since it is larger than the sum of its proper divisors (23173882949).

135603313531 is an equidigital number, since it uses as much as digits as its factorization.

135603313531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65814.

The product of its (nonzero) digits is 36450, while the sum is 34.

The spelling of 135603313531 in words is "one hundred thirty-five billion, six hundred three million, three hundred thirteen thousand, five hundred thirty-one".