2728443131 has 2 divisors, whose sum is σ = 2728443132. Its totient is φ = 2728443130.

The previous prime is 2728443049. The next prime is 2728443229. The reversal of 2728443131 is 1313448272.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728443131 is a prime.

It is a super-2 number, since 2×2728443131² = 14888803838202166322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2728443091 and 2728443100.

It is not a weakly prime, because it can be changed into another prime (2728440131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1364221565 + 1364221566.

It is an arithmetic number, because the mean of its divisors is an integer number (1364221566).

Almost surely, 2^2728443131 is an apocalyptic number.

2728443131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2728443131 is an equidigital number, since it uses as much as digits as its factorization.

2728443131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 2728443131 is about 52234.5013472896. The cubic root of 2728443131 is about 1397.3492582673.

The spelling of 2728443131 in words is "two billion, seven hundred twenty-eight million, four hundred forty-three thousand, one hundred thirty-one".