23106581 has 2 divisors, whose sum is σ = 23106582. Its totient is φ = 23106580.

The previous prime is 23106571. The next prime is 23106637. The reversal of 23106581 is 18560132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 10504081 = 3550^2 + 3241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23106581 is a prime.

It is a super-2 number, since 2×23106581² = 1067828171019122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23106581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23106511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11553290 + 11553291.

It is an arithmetic number, because the mean of its divisors is an integer number (11553291).

Almost surely, 2^23106581 is an apocalyptic number.

It is an amenable number.

23106581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23106581 is an equidigital number, since it uses as much as digits as its factorization.

23106581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 23106581 is about 4806.9305174924. The cubic root of 23106581 is about 284.8252997253.

The spelling of 23106581 in words is "twenty-three million, one hundred six thousand, five hundred eighty-one".