2491639223 has 4 divisors (see below), whose sum is σ = 2523179040. Its totient is φ = 2460099408.

The previous prime is 2491639219. The next prime is 2491639253. The reversal of 2491639223 is 3229361942.

2491639223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2491639223 - 2² = 2491639219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491639253) 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, 15769790 + ... + 15769947.

It is an arithmetic number, because the mean of its divisors is an integer number (630794760).

Almost surely, 2^2491639223 is an apocalyptic number.

2491639223 is a deficient number, since it is larger than the sum of its proper divisors (31539817).

2491639223 is an equidigital number, since it uses as much as digits as its factorization.

2491639223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31539816.

The product of its digits is 139968, while the sum is 41.

The square root of 2491639223 is about 49916.3222102751. The cubic root of 2491639223 is about 1355.6941425110.

The spelling of 2491639223 in words is "two billion, four hundred ninety-one million, six hundred thirty-nine thousand, two hundred twenty-three".