2165132131 has 4 divisors (see below), whose sum is σ = 2166280200. Its totient is φ = 2163984064.

The previous prime is 2165132119. The next prime is 2165132143. The reversal of 2165132131 is 1312315612.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2165132119) and next prime (2165132143).

It is a cyclic number.

It is not a de Polignac number, because 2165132131 - 2⁷ = 2165132003 is a prime.

It is a super-2 number, since 2×2165132131² = 9375594289377202322, 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 = 2165132096 and 2165132105.

It is not an unprimeable number, because it can be changed into a prime (2165132111) 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, 571201 + ... + 574978.

It is an arithmetic number, because the mean of its divisors is an integer number (541570050).

Almost surely, 2^2165132131 is an apocalyptic number.

2165132131 is a deficient number, since it is larger than the sum of its proper divisors (1148069).

2165132131 is a wasteful number, since it uses less digits than its factorization.

2165132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148068.

The product of its digits is 1080, while the sum is 25.

The square root of 2165132131 is about 46530.9803356860. The cubic root of 2165132131 is about 1293.6837858369.

Adding to 2165132131 its reverse (1312315612), we get a palindrome (3477447743).

The spelling of 2165132131 in words is "two billion, one hundred sixty-five million, one hundred thirty-two thousand, one hundred thirty-one".