2239857931 has 4 divisors (see below), whose sum is σ = 2249639200. Its totient is φ = 2230076664.

The previous prime is 2239857923. The next prime is 2239857989. The reversal of 2239857931 is 1397589322.

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 2239857931 - 2³ = 2239857923 is a prime.

It is a super-2 number, since 2×2239857931² = 10033927102127201522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2239857031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4890291 + ... + 4890748.

It is an arithmetic number, because the mean of its divisors is an integer number (562409800).

Almost surely, 2^2239857931 is an apocalyptic number.

2239857931 is a deficient number, since it is larger than the sum of its proper divisors (9781269).

2239857931 is an equidigital number, since it uses as much as digits as its factorization.

2239857931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9781268.

The product of its digits is 816480, while the sum is 49.

The square root of 2239857931 is about 47327.1373632507. The cubic root of 2239857931 is about 1308.3988617573.

The spelling of 2239857931 in words is "two billion, two hundred thirty-nine million, eight hundred fifty-seven thousand, nine hundred thirty-one".