561205172 has 12 divisors (see below), whose sum is σ = 1071391776. Its totient is φ = 255093240.

The previous prime is 561205123. The next prime is 561205189. The reversal of 561205172 is 271502165.

It is a super-3 number, since 3×561205172³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6377288 + ... + 6377375.

It is an arithmetic number, because the mean of its divisors is an integer number (89282648).

Almost surely, 2^561205172 is an apocalyptic number.

It is an amenable number.

561205172 is a deficient number, since it is larger than the sum of its proper divisors (510186604).

561205172 is a wasteful number, since it uses less digits than its factorization.

561205172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754678 (or 12754676 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 561205172 is about 23689.7693530351. The cubic root of 561205172 is about 824.8479288730.

The spelling of 561205172 in words is "five hundred sixty-one million, two hundred five thousand, one hundred seventy-two".