561500424 has 40 divisors (see below), whose sum is σ = 1572722910. Its totient is φ = 187166592.

The previous prime is 561500417. The next prime is 561500431. The reversal of 561500424 is 424005165.

561500424 is a `hidden beast` number, since 5 + 615 + 0 + 0 + 42 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (561500417) and next prime (561500431).

It can be written as a sum of positive squares in only one way, i.e., 324648324 + 236852100 = 18018^2 + 15390^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 432609 + ... + 433904.

Almost surely, 2^561500424 is an apocalyptic number.

561500424 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

561500424 is an abundant number, since it is smaller than the sum of its proper divisors (1011222486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561500424 is a wasteful number, since it uses less digits than its factorization.

561500424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866531 (or 866518 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 561500424 is about 23696.0001688049. Note that the first 3 decimals coincide. The cubic root of 561500424 is about 824.9925553047.

Adding to 561500424 its reverse (424005165), we get a palindrome (985505589).

The spelling of 561500424 in words is "five hundred sixty-one million, five hundred thousand, four hundred twenty-four".