52403221 has 8 divisors (see below), whose sum is σ = 56519064. Its totient is φ = 48299520.

The previous prime is 52403213. The next prime is 52403243. The reversal of 52403221 is 12230425.

It can be written as a sum of positive squares in 4 ways, for example, as 100 + 52403121 = 10^2 + 7239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52403221 - 2³ = 52403213 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 (52403321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7245 + ... + 12541.

It is an arithmetic number, because the mean of its divisors is an integer number (7064883).

Almost surely, 2^52403221 is an apocalyptic number.

It is an amenable number.

52403221 is a deficient number, since it is larger than the sum of its proper divisors (4115843).

52403221 is a wasteful number, since it uses less digits than its factorization.

52403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 52403221 is about 7239.0069070281. The cubic root of 52403221 is about 374.2133935247.

Adding to 52403221 its reverse (12230425), we get a palindrome (64633646).

The spelling of 52403221 in words is "fifty-two million, four hundred three thousand, two hundred twenty-one".