13087855 has 32 divisors (see below), whose sum is σ = 17998848. Its totient is φ = 9052800.

The previous prime is 13087819. The next prime is 13087861. The reversal of 13087855 is 55878031.

13087855 = T₄₈₀ + T₄₈₁ + ... + T₅₇₃.

It is not a de Polignac number, because 13087855 - 2⁷ = 13087727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157644 + ... + 157726.

It is an arithmetic number, because the mean of its divisors is an integer number (562464).

Almost surely, 2^13087855 is an apocalyptic number.

13087855 is a deficient number, since it is larger than the sum of its proper divisors (4910993).

13087855 is a wasteful number, since it uses less digits than its factorization.

13087855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 13087855 is about 3617.7140572466. The cubic root of 13087855 is about 235.6619633747.

The spelling of 13087855 in words is "thirteen million, eighty-seven thousand, eight hundred fifty-five".