501006505 has 4 divisors (see below), whose sum is σ = 601207812. Its totient is φ = 400805200.

The previous prime is 501006449. The next prime is 501006521. The reversal of 501006505 is 505600105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505600105 = 5 ⋅101120021.

It can be written as a sum of positive squares in 2 ways, for example, as 173686041 + 327320464 = 13179^2 + 18092^2 .

It is not a de Polignac number, because 501006505 - 2¹⁹ = 500482217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50100646 + ... + 50100655.

It is an arithmetic number, because the mean of its divisors is an integer number (150301953).

Almost surely, 2^501006505 is an apocalyptic number.

It is an amenable number.

501006505 is a deficient number, since it is larger than the sum of its proper divisors (100201307).

501006505 is a wasteful number, since it uses less digits than its factorization.

501006505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100201306.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 501006505 is about 22383.1745961112. The cubic root of 501006505 is about 794.2327447217.

The spelling of 501006505 in words is "five hundred one million, six thousand, five hundred five".