2179131329 has 4 divisors (see below), whose sum is σ = 2249425920. Its totient is φ = 2108836740.

The previous prime is 2179131323. The next prime is 2179131347. The reversal of 2179131329 is 9231319712.

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 2179131329 - 2²⁴ = 2162354113 is a prime.

It is a super-2 number, since 2×2179131329² = 9497226698058612482, 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 = 2179131292 and 2179131301.

It is not an unprimeable number, because it can be changed into a prime (2179131323) 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, 35147249 + ... + 35147310.

It is an arithmetic number, because the mean of its divisors is an integer number (562356480).

Almost surely, 2^2179131329 is an apocalyptic number.

It is an amenable number.

2179131329 is a deficient number, since it is larger than the sum of its proper divisors (70294591).

2179131329 is an equidigital number, since it uses as much as digits as its factorization.

2179131329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70294590.

The product of its digits is 20412, while the sum is 38.

The square root of 2179131329 is about 46681.1667484865. The cubic root of 2179131329 is about 1296.4660090091.

The spelling of 2179131329 in words is "two billion, one hundred seventy-nine million, one hundred thirty-one thousand, three hundred twenty-nine".