10509181 has 2 divisors, whose sum is σ = 10509182. Its totient is φ = 10509180.

The previous prime is 10509173. The next prime is 10509197. The reversal of 10509181 is 18190501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8213956 + 2295225 = 2866^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 10509181 - 2³ = 10509173 is a prime.

It is a super-2 number, since 2×10509181² = 220885770581522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10509101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254590 + 5254591.

It is an arithmetic number, because the mean of its divisors is an integer number (5254591).

Almost surely, 2^10509181 is an apocalyptic number.

It is an amenable number.

10509181 is a deficient number, since it is larger than the sum of its proper divisors (1).

10509181 is an equidigital number, since it uses as much as digits as its factorization.

10509181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 10509181 is about 3241.7866987203. The cubic root of 10509181 is about 219.0397612036.

Adding to 10509181 its reverse (18190501), we get a palindrome (28699682).

The spelling of 10509181 in words is "ten million, five hundred nine thousand, one hundred eighty-one".