13155321 has 8 divisors (see below), whose sum is σ = 17828224. Its totient is φ = 8626320.

The previous prime is 13155281. The next prime is 13155323. The reversal of 13155321 is 12355131.

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

It is not a de Polignac number, because 13155321 - 2⁷ = 13155193 is a prime.

It is a super-2 number, since 2×13155321² = 346124941226082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155323) 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, 35761 + ... + 36126.

It is an arithmetic number, because the mean of its divisors is an integer number (2228528).

Almost surely, 2^13155321 is an apocalyptic number.

It is an amenable number.

13155321 is a deficient number, since it is larger than the sum of its proper divisors (4672903).

13155321 is an equidigital number, since it uses as much as digits as its factorization.

13155321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71951.

The product of its digits is 450, while the sum is 21.

The square root of 13155321 is about 3627.0264680589. The cubic root of 13155321 is about 236.0662040156.

The spelling of 13155321 in words is "thirteen million, one hundred fifty-five thousand, three hundred twenty-one".