2581815022139 has 2 divisors, whose sum is σ = 2581815022140. Its totient is φ = 2581815022138.

The previous prime is 2581815022121. The next prime is 2581815022153. The reversal of 2581815022139 is 9312205181852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581815022139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2581815022093 and 2581815022102.

It is not a weakly prime, because it can be changed into another prime (2581815022159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290907511069 + 1290907511070.

It is an arithmetic number, because the mean of its divisors is an integer number (1290907511070).

Almost surely, 2^{2581815022139} is an apocalyptic number.

2581815022139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581815022139 is an equidigital number, since it uses as much as digits as its factorization.

2581815022139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 2581815022139 in words is "two trillion, five hundred eighty-one billion, eight hundred fifteen million, twenty-two thousand, one hundred thirty-nine".