501216401 has 8 divisors (see below), whose sum is σ = 591297024. Its totient is φ = 415755360.

The previous prime is 501216379. The next prime is 501216421. The reversal of 501216401 is 104612105.

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 501216401 - 2¹⁴ = 501200017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501216421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154660 + ... + 1155093.

It is an arithmetic number, because the mean of its divisors is an integer number (73912128).

Almost surely, 2^501216401 is an apocalyptic number.

It is an amenable number.

501216401 is a deficient number, since it is larger than the sum of its proper divisors (90080623).

501216401 is a wasteful number, since it uses less digits than its factorization.

501216401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309791.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 501216401 is about 22387.8628055471. The cubic root of 501216401 is about 794.3436434822.

Adding to 501216401 its reverse (104612105), we get a palindrome (605828506).

The spelling of 501216401 in words is "five hundred one million, two hundred sixteen thousand, four hundred one".