501221516 has 24 divisors (see below), whose sum is σ = 907146240. Its totient is φ = 242067600.

The previous prime is 501221509. The next prime is 501221527. The reversal of 501221516 is 615122105.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 501221491 and 501221500.

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, 67265 + ... + 74343.

It is an arithmetic number, because the mean of its divisors is an integer number (37797760).

Almost surely, 2^501221516 is an apocalyptic number.

It is an amenable number.

501221516 is a deficient number, since it is larger than the sum of its proper divisors (405924724).

501221516 is a wasteful number, since it uses less digits than its factorization.

501221516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7685 (or 7683 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 501221516 is about 22387.9770412603. The cubic root of 501221516 is about 794.3463456111.

The spelling of 501221516 in words is "five hundred one million, two hundred twenty-one thousand, five hundred sixteen".