52309221 has 16 divisors (see below), whose sum is σ = 74213568. Its totient is φ = 32659200.

The previous prime is 52309207. The next prime is 52309241. The reversal of 52309221 is 12290325.

It is not a de Polignac number, because 52309221 - 2¹⁸ = 52047077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52309191 and 52309200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52309241) 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, 8331 + ... + 13191.

It is an arithmetic number, because the mean of its divisors is an integer number (4638348).

Almost surely, 2^52309221 is an apocalyptic number.

52309221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52309221 is a deficient number, since it is larger than the sum of its proper divisors (21904347).

52309221 is a wasteful number, since it uses less digits than its factorization.

52309221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 52309221 is about 7232.5113895520. The cubic root of 52309221 is about 373.9895070788.

Adding to 52309221 its reverse (12290325), we get a palindrome (64599546).

The spelling of 52309221 in words is "fifty-two million, three hundred nine thousand, two hundred twenty-one".