2439681331 has 4 divisors (see below), whose sum is σ = 2439979200. Its totient is φ = 2439383464.

The previous prime is 2439681269. The next prime is 2439681367. The reversal of 2439681331 is 1331869342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331869342 = 2 ⋅665934671.

It is a cyclic number.

It is not a de Polignac number, because 2439681331 - 2⁹ = 2439680819 is a prime.

It is a super-2 number, since 2×2439681331² = 11904089993659863122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2439681371) 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, 136291 + ... + 153148.

It is an arithmetic number, because the mean of its divisors is an integer number (609994800).

Almost surely, 2^2439681331 is an apocalyptic number.

2439681331 is a deficient number, since it is larger than the sum of its proper divisors (297869).

2439681331 is an equidigital number, since it uses as much as digits as its factorization.

2439681331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297868.

The product of its digits is 93312, while the sum is 40.

The square root of 2439681331 is about 49393.1304029214. The cubic root of 2439681331 is about 1346.2044886616.

The spelling of 2439681331 in words is "two billion, four hundred thirty-nine million, six hundred eighty-one thousand, three hundred thirty-one".