13531520052 has 18 divisors (see below), whose sum is σ = 34204675778. Its totient is φ = 4510506672.

The previous prime is 13531519961. The next prime is 13531520063. The reversal of 13531520052 is 25002513531.

It is a happy number.

13531520052 is a `hidden beast` number, since 135 + 3 + 1 + 520 + 0 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11906301456 + 1625218596 = 109116^2 + 40314^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 13531519998 and 13531520025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187937743 + ... + 187937814.

Almost surely, 2^13531520052 is an apocalyptic number.

13531520052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13531520052 is an abundant number, since it is smaller than the sum of its proper divisors (20673155726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531520052 is a wasteful number, since it uses less digits than its factorization.

13531520052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375875567 (or 375875562 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 13531520052 in words is "thirteen billion, five hundred thirty-one million, five hundred twenty thousand, fifty-two".