10361581 has 4 divisors (see below), whose sum is σ = 10602592. Its totient is φ = 10120572.

The previous prime is 10361579. The next prime is 10361597. The reversal of 10361581 is 18516301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10361581 - 2¹ = 10361579 is a prime.

It is a super-3 number, since 3×10361581³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10361501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120441 + ... + 120526.

It is an arithmetic number, because the mean of its divisors is an integer number (2650648).

Almost surely, 2^10361581 is an apocalyptic number.

It is an amenable number.

10361581 is a deficient number, since it is larger than the sum of its proper divisors (241011).

10361581 is an equidigital number, since it uses as much as digits as its factorization.

10361581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241010.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 10361581 is about 3218.9409749171. The cubic root of 10361581 is about 218.0094614753.

Adding to 10361581 its reverse (18516301), we get a palindrome (28877882).

The spelling of 10361581 in words is "ten million, three hundred sixty-one thousand, five hundred eighty-one".