561222015 has 8 divisors (see below), whose sum is σ = 897955248. Its totient is φ = 299318400.

The previous prime is 561222001. The next prime is 561222023. The reversal of 561222015 is 510222165.

It is a happy number.

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

It is not a de Polignac number, because 561222015 - 2⁷ = 561221887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18707386 + ... + 18707415.

It is an arithmetic number, because the mean of its divisors is an integer number (112244406).

Almost surely, 2^561222015 is an apocalyptic number.

561222015 is a deficient number, since it is larger than the sum of its proper divisors (336733233).

561222015 is a wasteful number, since it uses less digits than its factorization.

561222015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37414809.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 561222015 is about 23690.1248413764. The cubic root of 561222015 is about 824.8561806232.

The spelling of 561222015 in words is "five hundred sixty-one million, two hundred twenty-two thousand, fifteen".