10561191 has 16 divisors (see below), whose sum is σ = 14657760. Its totient is φ = 6755840.

The previous prime is 10561181. The next prime is 10561211. The reversal of 10561191 is 19116501.

It is not a de Polignac number, because 10561191 - 2⁶ = 10561127 is a prime.

It is a super-2 number, since 2×10561191² = 223077510676962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10561121) 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 in 15 ways as a sum of consecutive naturals, for example, 20011 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (916110).

Almost surely, 2^10561191 is an apocalyptic number.

10561191 is a deficient number, since it is larger than the sum of its proper divisors (4096569).

10561191 is a wasteful number, since it uses less digits than its factorization.

10561191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 270, while the sum is 24.

The square root of 10561191 is about 3249.7986091449. The cubic root of 10561191 is about 219.4005097729.

Adding to 10561191 its reverse (19116501), we get a palindrome (29677692).

The spelling of 10561191 in words is "ten million, five hundred sixty-one thousand, one hundred ninety-one".