16813155 has 16 divisors (see below), whose sum is σ = 27281664. Its totient is φ = 8840160.

The previous prime is 16813151. The next prime is 16813163. The reversal of 16813155 is 55131861.

It is not a de Polignac number, because 16813155 - 2² = 16813151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16813151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6829 + ... + 8958.

It is an arithmetic number, because the mean of its divisors is an integer number (1705104).

Almost surely, 2^16813155 is an apocalyptic number.

16813155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16813155 is a deficient number, since it is larger than the sum of its proper divisors (10468509).

16813155 is a wasteful number, since it uses less digits than its factorization.

16813155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866.

The product of its digits is 3600, while the sum is 30.

The square root of 16813155 is about 4100.3847380459. The cubic root of 16813155 is about 256.1826648380.

The spelling of 16813155 in words is "sixteen million, eight hundred thirteen thousand, one hundred fifty-five".