13009855 has 8 divisors (see below), whose sum is σ = 15631200. Its totient is φ = 10394976.

The previous prime is 13009823. The next prime is 13009901. The reversal of 13009855 is 55890031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13009855 - 2⁵ = 13009823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6961 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (1953900).

Almost surely, 2^13009855 is an apocalyptic number.

13009855 is a deficient number, since it is larger than the sum of its proper divisors (2621345).

13009855 is a wasteful number, since it uses less digits than its factorization.

13009855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 13009855 is about 3606.9176591655. The cubic root of 13009855 is about 235.1928701832.

Adding to 13009855 its reverse (55890031), we get a palindrome (68899886).

The spelling of 13009855 in words is "thirteen million, nine thousand, eight hundred fifty-five".