2815161 has 4 divisors (see below), whose sum is σ = 3753552. Its totient is φ = 1876772.

The previous prime is 2815157. The next prime is 2815171. The reversal of 2815161 is 1615182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2815161 - 2² = 2815157 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2815171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469191 + ... + 469196.

It is an arithmetic number, because the mean of its divisors is an integer number (938388).

2^2815161 is an apocalyptic number.

It is an amenable number.

2815161 is a deficient number, since it is larger than the sum of its proper divisors (938391).

2815161 is an equidigital number, since it uses as much as digits as its factorization.

2815161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938390.

The product of its digits is 480, while the sum is 24.

The square root of 2815161 is about 1677.8441524766. The cubic root of 2815161 is about 141.1999075775.

The spelling of 2815161 in words is "two million, eight hundred fifteen thousand, one hundred sixty-one".