52021399 has 2 divisors, whose sum is σ = 52021400. Its totient is φ = 52021398.

The previous prime is 52021397. The next prime is 52021451. The reversal of 52021399 is 99312025.

52021399 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 is a cyclic number.

It is not a de Polignac number, because 52021399 - 2¹ = 52021397 is a prime.

Together with 52021397, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 52021399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52021393) 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, 26010699 + 26010700.

It is an arithmetic number, because the mean of its divisors is an integer number (26010700).

Almost surely, 2^52021399 is an apocalyptic number.

52021399 is a deficient number, since it is larger than the sum of its proper divisors (1).

52021399 is an equidigital number, since it uses as much as digits as its factorization.

52021399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 52021399 is about 7212.5861519985. The cubic root of 52021399 is about 373.3023086641.

The spelling of 52021399 in words is "fifty-two million, twenty-one thousand, three hundred ninety-nine".