52707221 has 4 divisors (see below), whose sum is σ = 60236832. Its totient is φ = 45177612.

The previous prime is 52707217. The next prime is 52707227. The reversal of 52707221 is 12270725.

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 a cyclic number.

It is not a de Polignac number, because 52707221 - 2² = 52707217 is a prime.

It is a super-2 number, since 2×52707221² = 5556102291085682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52707227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3764795 + ... + 3764808.

It is an arithmetic number, because the mean of its divisors is an integer number (15059208).

Almost surely, 2^52707221 is an apocalyptic number.

It is an amenable number.

52707221 is a deficient number, since it is larger than the sum of its proper divisors (7529611).

52707221 is an equidigital number, since it uses as much as digits as its factorization.

52707221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529610.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 52707221 is about 7259.9738980247. The cubic root of 52707221 is about 374.9356239122.

Adding to 52707221 its reverse (12270725), we get a palindrome (64977946).

The spelling of 52707221 in words is "fifty-two million, seven hundred seven thousand, two hundred twenty-one".