13531332015 has 64 divisors (see below), whose sum is σ = 24499384320. Its totient is φ = 7084091520.

The previous prime is 13531331999. The next prime is 13531332047. The reversal of 13531332015 is 51023313531.

13531332015 is a `hidden beast` number, since 13 + 5 + 313 + 320 + 15 = 666.

It is not a de Polignac number, because 13531332015 - 2⁴ = 13531331999 is a prime.

It is a super-2 number, since 2×13531332015² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13531332015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4997292 + ... + 4999998.

It is an arithmetic number, because the mean of its divisors is an integer number (382802880).

Almost surely, 2^13531332015 is an apocalyptic number.

13531332015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13531332015 is a deficient number, since it is larger than the sum of its proper divisors (10968052305).

13531332015 is a wasteful number, since it uses less digits than its factorization.

13531332015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389 (or 3383 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

Adding to 13531332015 its reverse (51023313531), we get a palindrome (64554645546).

The spelling of 13531332015 in words is "thirteen billion, five hundred thirty-one million, three hundred thirty-two thousand, fifteen".