52270221 has 4 divisors (see below), whose sum is σ = 69693632. Its totient is φ = 34846812.

The previous prime is 52270201. The next prime is 52270261. The reversal of 52270221 is 12207225.

It is a happy number.

52270221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 52270221 - 2⁹ = 52269709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52270201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8711701 + ... + 8711706.

It is an arithmetic number, because the mean of its divisors is an integer number (17423408).

Almost surely, 2^52270221 is an apocalyptic number.

It is an amenable number.

52270221 is a deficient number, since it is larger than the sum of its proper divisors (17423411).

52270221 is a wasteful number, since it uses less digits than its factorization.

52270221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423410.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 52270221 is about 7229.8147279166. The cubic root of 52270221 is about 373.8965392945.

Subtracting from 52270221 its sum of digits (21), we obtain a triangular number (52270200 = T₁₀₂₂₄).

Adding to 52270221 its reverse (12207225), we get a palindrome (64477446).

The spelling of 52270221 in words is "fifty-two million, two hundred seventy thousand, two hundred twenty-one".