2239521223679 has 4 divisors (see below), whose sum is σ = 2239524728784. Its totient is φ = 2239517718576.

The previous prime is 2239521223669. The next prime is 2239521223801. The reversal of 2239521223679 is 9763221259322.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2239521223679 is a prime.

It is a super-2 number, since 2×2239521223679² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2239521223679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2239521223669) 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, 491867 + ... + 2172780.

It is an arithmetic number, because the mean of its divisors is an integer number (559881182196).

Almost surely, 2^{2239521223679} is an apocalyptic number.

2239521223679 is a deficient number, since it is larger than the sum of its proper divisors (3505105).

2239521223679 is an equidigital number, since it uses as much as digits as its factorization.

2239521223679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505104.

The product of its digits is 4898880, while the sum is 53.

The spelling of 2239521223679 in words is "two trillion, two hundred thirty-nine billion, five hundred twenty-one million, two hundred twenty-three thousand, six hundred seventy-nine".