561850217 has 8 divisors (see below), whose sum is σ = 578926656. Its totient is φ = 544873392.

The previous prime is 561850207. The next prime is 561850241. The reversal of 561850217 is 712058165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561850217 is a prime.

It is a super-5 number, since 5×561850217⁵ (a number of 45 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561850207) 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, 13373 + ... + 36090.

It is an arithmetic number, because the mean of its divisors is an integer number (72365832).

Almost surely, 2^561850217 is an apocalyptic number.

It is an amenable number.

561850217 is a deficient number, since it is larger than the sum of its proper divisors (17076439).

561850217 is a wasteful number, since it uses less digits than its factorization.

561850217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49807.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 561850217 is about 23703.3798644835. The cubic root of 561850217 is about 825.1638325382.

The spelling of 561850217 in words is "five hundred sixty-one million, eight hundred fifty thousand, two hundred seventeen".