2138511841 has 2 divisors, whose sum is σ = 2138511842. Its totient is φ = 2138511840.

The previous prime is 2138511833. The next prime is 2138511863. The reversal of 2138511841 is 1481158312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1945162816 + 193349025 = 44104^2 + 13905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2138511841 - 2³ = 2138511833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2138511797 and 2138511806.

It is not a weakly prime, because it can be changed into another prime (2138511811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069255920 + 1069255921.

It is an arithmetic number, because the mean of its divisors is an integer number (1069255921).

Almost surely, 2^2138511841 is an apocalyptic number.

It is an amenable number.

2138511841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138511841 is an equidigital number, since it uses as much as digits as its factorization.

2138511841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 34.

The square root of 2138511841 is about 46244.0465465556. The cubic root of 2138511841 is about 1288.3599615751.

The spelling of 2138511841 in words is "two billion, one hundred thirty-eight million, five hundred eleven thousand, eight hundred forty-one".