52207221 has 32 divisors (see below), whose sum is σ = 83203200. Its totient is φ = 28743680.

The previous prime is 52207213. The next prime is 52207273. The reversal of 52207221 is 12270225.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 52207221 - 2³ = 52207213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52207721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14665 + ... + 17873.

It is an arithmetic number, because the mean of its divisors is an integer number (2600100).

Almost surely, 2^52207221 is an apocalyptic number.

52207221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52207221 is a deficient number, since it is larger than the sum of its proper divisors (30995979).

52207221 is a wasteful number, since it uses less digits than its factorization.

52207221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269.

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

The square root of 52207221 is about 7225.4564561694. The cubic root of 52207221 is about 373.7462628307.

Adding to 52207221 its reverse (12270225), we get a palindrome (64477446).

The spelling of 52207221 in words is "fifty-two million, two hundred seven thousand, two hundred twenty-one".