13201855 has 4 divisors (see below), whose sum is σ = 15842232. Its totient is φ = 10561480.

The previous prime is 13201849. The next prime is 13201861. The reversal of 13201855 is 55810231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13201849) and next prime (13201861).

It is not a de Polignac number, because 13201855 - 2²¹ = 11104703 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 3 ways as a sum of consecutive naturals, for example, 1320181 + ... + 1320190.

It is an arithmetic number, because the mean of its divisors is an integer number (3960558).

Almost surely, 2^13201855 is an apocalyptic number.

13201855 is a deficient number, since it is larger than the sum of its proper divisors (2640377).

13201855 is an equidigital number, since it uses as much as digits as its factorization.

13201855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640376.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 13201855 is about 3633.4357019218. The cubic root of 13201855 is about 236.3442202314.

The spelling of 13201855 in words is "thirteen million, two hundred one thousand, eight hundred fifty-five".