501216563 has 8 divisors (see below), whose sum is σ = 504004032. Its totient is φ = 498436096.

The previous prime is 501216539. The next prime is 501216631. The reversal of 501216563 is 365612105.

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

It is a cyclic number.

It is not a de Polignac number, because 501216563 - 2⁸ = 501216307 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501216503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203606 + ... + 206052.

It is an arithmetic number, because the mean of its divisors is an integer number (63000504).

Almost surely, 2^501216563 is an apocalyptic number.

501216563 is a deficient number, since it is larger than the sum of its proper divisors (2787469).

501216563 is a wasteful number, since it uses less digits than its factorization.

501216563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 501216563 is about 22387.8664235786. The cubic root of 501216563 is about 794.3437290631.

Adding to 501216563 its reverse (365612105), we get a palindrome (866828668).

The spelling of 501216563 in words is "five hundred one million, two hundred sixteen thousand, five hundred sixty-three".