2145081139 has 2 divisors, whose sum is σ = 2145081140. Its totient is φ = 2145081138.

The previous prime is 2145081089. The next prime is 2145081161. The reversal of 2145081139 is 9311805412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145081139 - 2¹⁵ = 2145048371 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145081439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072540569 + 1072540570.

It is an arithmetic number, because the mean of its divisors is an integer number (1072540570).

Almost surely, 2^2145081139 is an apocalyptic number.

2145081139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145081139 is an equidigital number, since it uses as much as digits as its factorization.

2145081139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 2145081139 is about 46315.0206628476. The cubic root of 2145081139 is about 1289.6778513723.

The spelling of 2145081139 in words is "two billion, one hundred forty-five million, eighty-one thousand, one hundred thirty-nine".