53252221 has 6 divisors (see below), whose sum is σ = 58533566. Its totient is φ = 48411000.

The previous prime is 53252197. The next prime is 53252237. The reversal of 53252221 is 12225235.

53252221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33988900 + 19263321 = 5830^2 + 4389^2 .

It is not a de Polignac number, because 53252221 - 2⁷ = 53252093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53252192 and 53252201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53252261) 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 5 ways as a sum of consecutive naturals, for example, 219930 + ... + 220171.

Almost surely, 2^53252221 is an apocalyptic number.

It is an amenable number.

53252221 is a deficient number, since it is larger than the sum of its proper divisors (5281345).

53252221 is a wasteful number, since it uses less digits than its factorization.

53252221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440123 (or 440112 counting only the distinct ones).

The product of its digits is 1200, while the sum is 22.

The square root of 53252221 is about 7297.4119384889. The cubic root of 53252221 is about 376.2234906618.

Adding to 53252221 its reverse (12225235), we get a palindrome (65477456).

The spelling of 53252221 in words is "fifty-three million, two hundred fifty-two thousand, two hundred twenty-one".