52347421 has 4 divisors (see below), whose sum is σ = 59825632. Its totient is φ = 44869212.

The previous prime is 52347419. The next prime is 52347433. The reversal of 52347421 is 12474325.

52347421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 52347421 - 2¹ = 52347419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52347421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52347401) 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 3 ways as a sum of consecutive naturals, for example, 3739095 + ... + 3739108.

It is an arithmetic number, because the mean of its divisors is an integer number (14956408).

Almost surely, 2^52347421 is an apocalyptic number.

It is an amenable number.

52347421 is a deficient number, since it is larger than the sum of its proper divisors (7478211).

52347421 is an equidigital number, since it uses as much as digits as its factorization.

52347421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478210.

The product of its digits is 6720, while the sum is 28.

The square root of 52347421 is about 7235.1517606751. The cubic root of 52347421 is about 374.0805230453.

The spelling of 52347421 in words is "fifty-two million, three hundred forty-seven thousand, four hundred twenty-one".