52170621 has 4 divisors (see below), whose sum is σ = 69560832. Its totient is φ = 34780412.

The previous prime is 52170607. The next prime is 52170649. The reversal of 52170621 is 12607125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52170621 - 2⁷ = 52170493 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52170591 and 52170600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52170721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8695101 + ... + 8695106.

It is an arithmetic number, because the mean of its divisors is an integer number (17390208).

Almost surely, 2^52170621 is an apocalyptic number.

It is an amenable number.

52170621 is a deficient number, since it is larger than the sum of its proper divisors (17390211).

52170621 is a wasteful number, since it uses less digits than its factorization.

52170621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17390210.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 52170621 is about 7222.9233001604. The cubic root of 52170621 is about 373.6589038358.

Adding to 52170621 its reverse (12607125), we get a palindrome (64777746).

The spelling of 52170621 in words is "fifty-two million, one hundred seventy thousand, six hundred twenty-one".