13531452525 has 72 divisors (see below), whose sum is σ = 24765591240. Its totient is φ = 7059985920.

The previous prime is 13531452503. The next prime is 13531452533. The reversal of 13531452525 is 52525413531.

It can be written as a sum of positive squares in 12 ways, for example, as 458045604 + 13073406921 = 21402^2 + 114339^2 .

It is not a de Polignac number, because 13531452525 - 2¹⁰ = 13531451501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13531452525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4637367 + ... + 4640283.

It is an arithmetic number, because the mean of its divisors is an integer number (343966545).

Almost surely, 2^13531452525 is an apocalyptic number.

13531452525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13531452525 is a deficient number, since it is larger than the sum of its proper divisors (11234138715).

13531452525 is a wasteful number, since it uses less digits than its factorization.

13531452525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375 (or 3367 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The spelling of 13531452525 in words is "thirteen billion, five hundred thirty-one million, four hundred fifty-two thousand, five hundred twenty-five".