13155563 has 8 divisors (see below), whose sum is σ = 14171136. Its totient is φ = 12177000.

The previous prime is 13155559. The next prime is 13155587. The reversal of 13155563 is 36555131.

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 13155563 - 2² = 13155559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8513 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (1771392).

Almost surely, 2^13155563 is an apocalyptic number.

13155563 is a deficient number, since it is larger than the sum of its proper divisors (1015573).

13155563 is a wasteful number, since it uses less digits than its factorization.

13155563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18505.

The product of its digits is 6750, while the sum is 29.

The square root of 13155563 is about 3627.0598285664. The cubic root of 13155563 is about 236.0676515331.

The spelling of 13155563 in words is "thirteen million, one hundred fifty-five thousand, five hundred sixty-three".