10561931 has 4 divisors (see below), whose sum is σ = 10570200. Its totient is φ = 10553664.

The previous prime is 10561927. The next prime is 10561933. The reversal of 10561931 is 13916501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10561931 - 2² = 10561927 is a prime.

It is a super-2 number, since 2×10561931² = 223108772897522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10561931.

It is not an unprimeable number, because it can be changed into a prime (10561933) 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, 1766 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (2642550).

Almost surely, 2^10561931 is an apocalyptic number.

10561931 is a deficient number, since it is larger than the sum of its proper divisors (8269).

10561931 is an equidigital number, since it uses as much as digits as its factorization.

10561931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 10561931 is about 3249.9124603595. The cubic root of 10561931 is about 219.4056339609.

The spelling of 10561931 in words is "ten million, five hundred sixty-one thousand, nine hundred thirty-one".