52470221 has 4 divisors (see below), whose sum is σ = 52533600. Its totient is φ = 52406844.

The previous prime is 52470203. The next prime is 52470227. The reversal of 52470221 is 12207425.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-52470221 is a prime.

It is a super-3 number, since 3×52470221³ (a number of 24 digits) contains 333 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 (52470227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30431 + ... + 32108.

It is an arithmetic number, because the mean of its divisors is an integer number (13133400).

Almost surely, 2^52470221 is an apocalyptic number.

It is an amenable number.

52470221 is a deficient number, since it is larger than the sum of its proper divisors (63379).

52470221 is an equidigital number, since it uses as much as digits as its factorization.

52470221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63378.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 52470221 is about 7243.6331353817. The cubic root of 52470221 is about 374.3728087865.

Adding to 52470221 its reverse (12207425), we get a palindrome (64677646).

The spelling of 52470221 in words is "fifty-two million, four hundred seventy thousand, two hundred twenty-one".