16397155 has 4 divisors (see below), whose sum is σ = 19676592. Its totient is φ = 13117720.

The previous prime is 16397141. The next prime is 16397167. The reversal of 16397155 is 55179361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55179361 = 4621 ⋅11941.

It is not a de Polignac number, because 16397155 - 2⁵ = 16397123 is a prime.

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, 1639711 + ... + 1639720.

It is an arithmetic number, because the mean of its divisors is an integer number (4919148).

Almost surely, 2^16397155 is an apocalyptic number.

16397155 is a deficient number, since it is larger than the sum of its proper divisors (3279437).

16397155 is an equidigital number, since it uses as much as digits as its factorization.

16397155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279436.

The product of its digits is 28350, while the sum is 37.

The square root of 16397155 is about 4049.3400696904. The cubic root of 16397155 is about 254.0521262395.

The spelling of 16397155 in words is "sixteen million, three hundred ninety-seven thousand, one hundred fifty-five".