52120221 has 16 divisors (see below), whose sum is σ = 72111360. Its totient is φ = 33445440.

The previous prime is 52120219. The next prime is 52120241. The reversal of 52120221 is 12202125.

It is not a de Polignac number, because 52120221 - 2¹ = 52120219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52120241) 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, 35916 + ... + 37338.

It is an arithmetic number, because the mean of its divisors is an integer number (4506960).

Almost surely, 2^52120221 is an apocalyptic number.

It is an amenable number.

52120221 is a deficient number, since it is larger than the sum of its proper divisors (19991139).

52120221 is a wasteful number, since it uses less digits than its factorization.

52120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 52120221 is about 7219.4335650382. The cubic root of 52120221 is about 373.5385393084.

Adding to 52120221 its reverse (12202125), we get a palindrome (64322346).

The spelling of 52120221 in words is "fifty-two million, one hundred twenty thousand, two hundred twenty-one".