505221670 has 8 divisors (see below), whose sum is σ = 909399024. Its totient is φ = 202088664.

The previous prime is 505221667. The next prime is 505221671. The reversal of 505221670 is 76122505.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505221671) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 25261074 + ... + 25261093.

It is an arithmetic number, because the mean of its divisors is an integer number (113674878).

Almost surely, 2^505221670 is an apocalyptic number.

505221670 is a deficient number, since it is larger than the sum of its proper divisors (404177354).

505221670 is a wasteful number, since it uses less digits than its factorization.

505221670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50522174.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 505221670 is about 22477.1366058936. The cubic root of 505221670 is about 796.4539247035.

The spelling of 505221670 in words is "five hundred five million, two hundred twenty-one thousand, six hundred seventy".