52016421 has 4 divisors (see below), whose sum is σ = 69355232. Its totient is φ = 34677612.

The previous prime is 52016399. The next prime is 52016423. The reversal of 52016421 is 12461025.

52016421 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 not a de Polignac number, because 52016421 - 2⁵ = 52016389 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 (52016423) 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, 8669401 + ... + 8669406.

It is an arithmetic number, because the mean of its divisors is an integer number (17338808).

Almost surely, 2^52016421 is an apocalyptic number.

It is an amenable number.

52016421 is a deficient number, since it is larger than the sum of its proper divisors (17338811).

52016421 is a wasteful number, since it uses less digits than its factorization.

52016421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17338810.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 52016421 is about 7212.2410525439. The cubic root of 52016421 is about 373.2904010119.

Adding to 52016421 its reverse (12461025), we get a palindrome (64477446).

The spelling of 52016421 in words is "fifty-two million, sixteen thousand, four hundred twenty-one".