13155320 has 16 divisors (see below), whose sum is σ = 29599560. Its totient is φ = 5262112.

The previous prime is 13155281. The next prime is 13155323. The reversal of 13155320 is 2355131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13155292 and 13155301.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 164402 + ... + 164481.

Almost surely, 2^13155320 is an apocalyptic number.

13155320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13155320 is an abundant number, since it is smaller than the sum of its proper divisors (16444240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13155320 is a wasteful number, since it uses less digits than its factorization.

13155320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328894 (or 328890 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13155320 is about 3627.0263302050. The cubic root of 13155320 is about 236.0661980341.

The spelling of 13155320 in words is "thirteen million, one hundred fifty-five thousand, three hundred twenty".