2138628571 has 2 divisors, whose sum is σ = 2138628572. Its totient is φ = 2138628570.

The previous prime is 2138628551. The next prime is 2138628617. The reversal of 2138628571 is 1758268312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2138628571 - 2⁹ = 2138628059 is a prime.

It is not a weakly prime, because it can be changed into another prime (2138628551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069314285 + 1069314286.

It is an arithmetic number, because the mean of its divisors is an integer number (1069314286).

Almost surely, 2^2138628571 is an apocalyptic number.

2138628571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138628571 is an equidigital number, since it uses as much as digits as its factorization.

2138628571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 2138628571 is about 46245.3086377418. The cubic root of 2138628571 is about 1288.3834027238.

The spelling of 2138628571 in words is "two billion, one hundred thirty-eight million, six hundred twenty-eight thousand, five hundred seventy-one".