2581031 has 2 divisors, whose sum is σ = 2581032. Its totient is φ = 2581030.

The previous prime is 2581027. The next prime is 2581049. The reversal of 2581031 is 1301852.

2581031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2581031 - 2² = 2581027 is a prime.

It is a super-2 number, since 2×2581031² = 13323442045922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2580994 and 2581012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2581081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290515 + 1290516.

It is an arithmetic number, because the mean of its divisors is an integer number (1290516).

2^2581031 is an apocalyptic number.

2581031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581031 is an equidigital number, since it uses as much as digits as its factorization.

2581031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2581031 is about 1606.5587446465. The cubic root of 2581031 is about 137.1716639739.

Adding to 2581031 its reverse (1301852), we get a palindrome (3882883).

The spelling of 2581031 in words is "two million, five hundred eighty-one thousand, thirty-one".