10581581 has 2 divisors, whose sum is σ = 10581582. Its totient is φ = 10581580.

The previous prime is 10581577. The next prime is 10581619. The reversal of 10581581 is 18518501.

10581581 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 can be written as a sum of positive squares in only one way, i.e., 8649481 + 1932100 = 2941^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 10581581 - 2² = 10581577 is a prime.

It is a super-2 number, since 2×10581581² = 223939712919122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10581521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290790 + 5290791.

It is an arithmetic number, because the mean of its divisors is an integer number (5290791).

Almost surely, 2^10581581 is an apocalyptic number.

It is an amenable number.

10581581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10581581 is an equidigital number, since it uses as much as digits as its factorization.

10581581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 10581581 is about 3252.9342139060. The cubic root of 10581581 is about 219.5416144552.

The spelling of 10581581 in words is "ten million, five hundred eighty-one thousand, five hundred eighty-one".