52831421 has 2 divisors, whose sum is σ = 52831422. Its totient is φ = 52831420.

The previous prime is 52831369. The next prime is 52831423. The reversal of 52831421 is 12413825.

52831421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 2208196 = 7115^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 52831421 - 2¹⁸ = 52569277 is a prime.

Together with 52831423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52831423) 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, 26415710 + 26415711.

It is an arithmetic number, because the mean of its divisors is an integer number (26415711).

Almost surely, 2^52831421 is an apocalyptic number.

It is an amenable number.

52831421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52831421 is an equidigital number, since it uses as much as digits as its factorization.

52831421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 52831421 is about 7268.5226146721. The cubic root of 52831421 is about 375.2298939975.

The spelling of 52831421 in words is "fifty-two million, eight hundred thirty-one thousand, four hundred twenty-one".