52030221 has 16 divisors (see below), whose sum is σ = 70245888. Its totient is φ = 34254000.

The previous prime is 52030211. The next prime is 52030247. The reversal of 52030221 is 12203025.

It is not a de Polignac number, because 52030221 - 2⁶ = 52030157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52030211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149770 + ... + 150116.

It is an arithmetic number, because the mean of its divisors is an integer number (4390368).

Almost surely, 2^52030221 is an apocalyptic number.

It is an amenable number.

52030221 is a deficient number, since it is larger than the sum of its proper divisors (18215667).

52030221 is a wasteful number, since it uses less digits than its factorization.

52030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832.

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

The square root of 52030221 is about 7213.1976958905. The cubic root of 52030221 is about 373.3234095116.

Adding to 52030221 its reverse (12203025), we get a palindrome (64233246).

The spelling of 52030221 in words is "fifty-two million, thirty thousand, two hundred twenty-one".