501622161 has 8 divisors (see below), whose sum is σ = 668935680. Its totient is φ = 334361712.

The previous prime is 501622127. The next prime is 501622169. The reversal of 501622161 is 161226105.

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

It is not a de Polignac number, because 501622161 - 2¹⁸ = 501360017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501622169) 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, 22795 + ... + 39023.

It is an arithmetic number, because the mean of its divisors is an integer number (83616960).

Almost surely, 2^501622161 is an apocalyptic number.

It is an amenable number.

501622161 is a deficient number, since it is larger than the sum of its proper divisors (167313519).

501622161 is a wasteful number, since it uses less digits than its factorization.

501622161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26535.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 501622161 is about 22396.9230252729. The cubic root of 501622161 is about 794.5579394357.

Adding to 501622161 its reverse (161226105), we get a palindrome (662848266).

The spelling of 501622161 in words is "five hundred one million, six hundred twenty-two thousand, one hundred sixty-one".