561504015 has 16 divisors (see below), whose sum is σ = 998229600. Its totient is φ = 299468736.

The previous prime is 561504001. The next prime is 561504029. The reversal of 561504015 is 510405165.

It is a happy number.

561504015 is a `hidden beast` number, since 5 + 615 + 0 + 40 + 1 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (561504001) and next prime (561504029).

It is not a de Polignac number, because 561504015 - 2⁶ = 561503951 is a prime.

It is a super-2 number, since 2×561504015² = 630573517722240450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 561504015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2079510 + ... + 2079779.

It is an arithmetic number, because the mean of its divisors is an integer number (62389350).

Almost surely, 2^561504015 is an apocalyptic number.

561504015 is a deficient number, since it is larger than the sum of its proper divisors (436725585).

561504015 is a wasteful number, since it uses less digits than its factorization.

561504015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159303 (or 4159297 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 561504015 is about 23696.0759409654. The cubic root of 561504015 is about 824.9943140104.

The spelling of 561504015 in words is "five hundred sixty-one million, five hundred four thousand, fifteen".