3161155 has 4 divisors (see below), whose sum is σ = 3793392. Its totient is φ = 2528920.

The previous prime is 3161149. The next prime is 3161159. The reversal of 3161155 is 5511613.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3161155 - 2⁹ = 3160643 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3161155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3161159) 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, 316111 + ... + 316120.

It is an arithmetic number, because the mean of its divisors is an integer number (948348).

Almost surely, 2^3161155 is an apocalyptic number.

3161155 is a deficient number, since it is larger than the sum of its proper divisors (632237).

3161155 is an equidigital number, since it uses as much as digits as its factorization.

3161155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632236.

The product of its digits is 450, while the sum is 22.

The square root of 3161155 is about 1777.9637229145. The cubic root of 3161155 is about 146.7625549499.

Adding to 3161155 its reverse (5511613), we get a palindrome (8672768).

The spelling of 3161155 in words is "three million, one hundred sixty-one thousand, one hundred fifty-five".