52173421 has 2 divisors, whose sum is σ = 52173422. Its totient is φ = 52173420.

The previous prime is 52173419. The next prime is 52173437. The reversal of 52173421 is 12437125.

It is a happy number.

52173421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 8468100 = 6611^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 52173421 - 2¹ = 52173419 is a prime.

Together with 52173419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52173481) 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 as a sum of consecutive naturals, namely, 26086710 + 26086711.

It is an arithmetic number, because the mean of its divisors is an integer number (26086711).

Almost surely, 2^52173421 is an apocalyptic number.

It is an amenable number.

52173421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52173421 is an equidigital number, since it uses as much as digits as its factorization.

52173421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 52173421 is about 7223.1171248984. The cubic root of 52173421 is about 373.6655884806.

The spelling of 52173421 in words is "fifty-two million, one hundred seventy-three thousand, four hundred twenty-one".