561533173 has 8 divisors (see below), whose sum is σ = 578732000. Its totient is φ = 544522608.

The previous prime is 561533153. The next prime is 561533191. The reversal of 561533173 is 371335165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561533173 - 2¹³ = 561524981 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 (561533113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40998 + ... + 52951.

It is an arithmetic number, because the mean of its divisors is an integer number (72341500).

Almost surely, 2^561533173 is an apocalyptic number.

It is an amenable number.

561533173 is a deficient number, since it is larger than the sum of its proper divisors (17198827).

561533173 is a wasteful number, since it uses less digits than its factorization.

561533173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94131.

The product of its digits is 28350, while the sum is 34.

The square root of 561533173 is about 23696.6911825259. The cubic root of 561533173 is about 825.0085939723.

The spelling of 561533173 in words is "five hundred sixty-one million, five hundred thirty-three thousand, one hundred seventy-three".