135503215523 has 16 divisors (see below), whose sum is σ = 146145396096. Its totient is φ = 124892474880.

The previous prime is 135503215501. The next prime is 135503215537. The reversal of 135503215523 is 325512305531.

It is a cyclic number.

It is not a de Polignac number, because 135503215523 - 2¹² = 135503211427 is a prime.

It is a super-2 number, since 2×135503215523² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135503215723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33266615 + ... + 33270687.

It is an arithmetic number, because the mean of its divisors is an integer number (9134087256).

Almost surely, 2^135503215523 is an apocalyptic number.

135503215523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135503215523 is a deficient number, since it is larger than the sum of its proper divisors (10642180573).

135503215523 is a wasteful number, since it uses less digits than its factorization.

135503215523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7294.

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

The spelling of 135503215523 in words is "one hundred thirty-five billion, five hundred three million, two hundred fifteen thousand, five hundred twenty-three".