561171015 has 12 divisors (see below), whose sum is σ = 972696504. Its totient is φ = 299291184.

The previous prime is 561170989. The next prime is 561171019. The reversal of 561171015 is 510171165.

It is a happy number.

It is not a de Polignac number, because 561171015 - 2⁸ = 561170759 is a prime.

It is a super-2 number, since 2×561171015² = 629825816152260450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561171015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561171019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6235189 + ... + 6235278.

It is an arithmetic number, because the mean of its divisors is an integer number (81058042).

Almost surely, 2^561171015 is an apocalyptic number.

561171015 is a deficient number, since it is larger than the sum of its proper divisors (411525489).

561171015 is a wasteful number, since it uses less digits than its factorization.

561171015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12470478 (or 12470475 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The square root of 561171015 is about 23689.0484190480. The cubic root of 561171015 is about 824.8311941126.

The spelling of 561171015 in words is "five hundred sixty-one million, one hundred seventy-one thousand, fifteen".