52230021 has 4 divisors (see below), whose sum is σ = 69640032. Its totient is φ = 34820012.

The previous prime is 52230007. The next prime is 52230047. The reversal of 52230021 is 12003225.

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 52230021 - 2⁹ = 52229509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52210021) 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, 8705001 + ... + 8705006.

It is an arithmetic number, because the mean of its divisors is an integer number (17410008).

Almost surely, 2^52230021 is an apocalyptic number.

It is an amenable number.

52230021 is a deficient number, since it is larger than the sum of its proper divisors (17410011).

52230021 is a wasteful number, since it uses less digits than its factorization.

52230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17410010.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 52230021 is about 7227.0340389402. The cubic root of 52230021 is about 373.8006625506.

Adding to 52230021 its reverse (12003225), we get a palindrome (64233246).

The spelling of 52230021 in words is "fifty-two million, two hundred thirty thousand, twenty-one".