2131161 has 8 divisors (see below), whose sum is σ = 2848320. Its totient is φ = 1417392.

The previous prime is 2131141. The next prime is 2131193. The reversal of 2131161 is 1611312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2131161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1860 + ... + 2778.

It is an arithmetic number, because the mean of its divisors is an integer number (356040).

2^2131161 is an apocalyptic number.

It is an amenable number.

2131161 is a deficient number, since it is larger than the sum of its proper divisors (717159).

2131161 is an equidigital number, since it uses as much as digits as its factorization.

2131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

The product of its digits is 36, while the sum is 15.

The square root of 2131161 is about 1459.8496497927. The cubic root of 2131161 is about 128.6882080083.

Adding to 2131161 its reverse (1611312), we get a palindrome (3742473).

The spelling of 2131161 in words is "two million, one hundred thirty-one thousand, one hundred sixty-one".