16872155 has 4 divisors (see below), whose sum is σ = 20246592. Its totient is φ = 13497720.

The previous prime is 16872137. The next prime is 16872161. The reversal of 16872155 is 55127861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55127861 = 523 ⋅105407.

It is not a de Polignac number, because 16872155 - 2¹⁴ = 16855771 is a prime.

It is a super-2 number, since 2×16872155² = 569339228688050, which contains 22 as substring.

It is a Duffinian 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, 1687211 + ... + 1687220.

It is an arithmetic number, because the mean of its divisors is an integer number (5061648).

Almost surely, 2^16872155 is an apocalyptic number.

16872155 is a deficient number, since it is larger than the sum of its proper divisors (3374437).

16872155 is an equidigital number, since it uses as much as digits as its factorization.

16872155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374436.

The product of its digits is 16800, while the sum is 35.

The square root of 16872155 is about 4107.5728843199. The cubic root of 16872155 is about 256.4819767275.

The spelling of 16872155 in words is "sixteen million, eight hundred seventy-two thousand, one hundred fifty-five".