505561506 has 16 divisors (see below), whose sum is σ = 1011366048. Its totient is φ = 168480000.

The previous prime is 505561499. The next prime is 505561513. The reversal of 505561506 is 605165505.

It is an interprime number because it is at equal distance from previous prime (505561499) and next prime (505561513).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27906 + ... + 42306.

It is an arithmetic number, because the mean of its divisors is an integer number (63210378).

Almost surely, 2^505561506 is an apocalyptic number.

505561506 is an abundant number, since it is smaller than the sum of its proper divisors (505804542).

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

505561506 is a wasteful number, since it uses less digits than its factorization.

505561506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20257.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 505561506 is about 22484.6949278837. The cubic root of 505561506 is about 796.6324622099.

The spelling of 505561506 in words is "five hundred five million, five hundred sixty-one thousand, five hundred six".