561822173 has 16 divisors (see below), whose sum is σ = 642816000. Its totient is φ = 486042480.

The previous prime is 561822169. The next prime is 561822181. The reversal of 561822173 is 371228165.

It is a happy number.

It is not a de Polignac number, because 561822173 - 2² = 561822169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561822113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44768 + ... + 55926.

It is an arithmetic number, because the mean of its divisors is an integer number (40176000).

Almost surely, 2^561822173 is an apocalyptic number.

It is an amenable number.

561822173 is a deficient number, since it is larger than the sum of its proper divisors (80993827).

561822173 is a wasteful number, since it uses less digits than its factorization.

561822173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11392.

The product of its digits is 20160, while the sum is 35.

The square root of 561822173 is about 23702.7882958946. The cubic root of 561822173 is about 825.1501033278.

The spelling of 561822173 in words is "five hundred sixty-one million, eight hundred twenty-two thousand, one hundred seventy-three".