2169131 has 4 divisors (see below), whose sum is σ = 2210112. Its totient is φ = 2128152.

The previous prime is 2169109. The next prime is 2169133. The reversal of 2169131 is 1319612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2169131 - 2¹⁰ = 2168107 is a prime.

It is a super-2 number, since 2×2169131² = 9410258590322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2169097 and 2169106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169133) 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, 20411 + ... + 20516.

It is an arithmetic number, because the mean of its divisors is an integer number (552528).

2^2169131 is an apocalyptic number.

2169131 is a deficient number, since it is larger than the sum of its proper divisors (40981).

2169131 is an equidigital number, since it uses as much as digits as its factorization.

2169131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40980.

The product of its digits is 324, while the sum is 23.

The square root of 2169131 is about 1472.7969989106. The cubic root of 2169131 is about 129.4479748089.

The spelling of 2169131 in words is "two million, one hundred sixty-nine thousand, one hundred thirty-one".