2443319381 has 4 divisors (see below), whose sum is σ = 2467510764. Its totient is φ = 2419128000.

The previous prime is 2443319357. The next prime is 2443319471. The reversal of 2443319381 is 1839133442.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1541818756 + 901500625 = 39266^2 + 30025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2443319381 - 2³⁰ = 1369577557 is a prime.

It is a super-2 number, since 2×2443319381² = 11939619195140446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443319311) 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, 12095540 + ... + 12095741.

It is an arithmetic number, because the mean of its divisors is an integer number (616877691).

Almost surely, 2^2443319381 is an apocalyptic number.

It is an amenable number.

2443319381 is a deficient number, since it is larger than the sum of its proper divisors (24191383).

2443319381 is a wasteful number, since it uses less digits than its factorization.

2443319381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24191382.

The product of its digits is 62208, while the sum is 38.

The square root of 2443319381 is about 49429.9441735473. The cubic root of 2443319381 is about 1346.8733091862.

The spelling of 2443319381 in words is "two billion, four hundred forty-three million, three hundred nineteen thousand, three hundred eighty-one".