2239521223681 has 12 divisors (see below), whose sum is σ = 2605302724608. Its totient is φ = 1919482496232.

The previous prime is 2239521223669. The next prime is 2239521223801. The reversal of 2239521223681 is 1863221259322.

It is not a de Polignac number, because 2239521223681 - 2⁷ = 2239521223553 is a prime.

It is a super-2 number, since 2×2239521223681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2239521223651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381961 + ... + 2150566.

It is an arithmetic number, because the mean of its divisors is an integer number (217108560384).

Almost surely, 2^{2239521223681} is an apocalyptic number.

It is an amenable number.

2239521223681 is a deficient number, since it is larger than the sum of its proper divisors (365781500927).

2239521223681 is a wasteful number, since it uses less digits than its factorization.

2239521223681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550588 (or 2550581 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The spelling of 2239521223681 in words is "two trillion, two hundred thirty-nine billion, five hundred twenty-one million, two hundred twenty-three thousand, six hundred eighty-one".