2179142499 has 4 divisors (see below), whose sum is σ = 2905523336. Its totient is φ = 1452761664.

The previous prime is 2179142453. The next prime is 2179142513. The reversal of 2179142499 is 9942419712.

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

It is a de Polignac number, because none of the positive numbers 2^k-2179142499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179142899) 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, 363190414 + ... + 363190419.

It is an arithmetic number, because the mean of its divisors is an integer number (726380834).

Almost surely, 2^2179142499 is an apocalyptic number.

2179142499 is a deficient number, since it is larger than the sum of its proper divisors (726380837).

2179142499 is an equidigital number, since it uses as much as digits as its factorization.

2179142499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726380836.

The product of its digits is 326592, while the sum is 48.

The square root of 2179142499 is about 46681.2863897301. The cubic root of 2179142499 is about 1296.4682241885.

The spelling of 2179142499 in words is "two billion, one hundred seventy-nine million, one hundred forty-two thousand, four hundred ninety-nine".