52821287 has 2 divisors, whose sum is σ = 52821288. Its totient is φ = 52821286.

The previous prime is 52821281. The next prime is 52821313. The reversal of 52821287 is 78212825.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52821287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52821281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26410643 + 26410644.

It is an arithmetic number, because the mean of its divisors is an integer number (26410644).

Almost surely, 2^52821287 is an apocalyptic number.

52821287 is a deficient number, since it is larger than the sum of its proper divisors (1).

52821287 is an equidigital number, since it uses as much as digits as its factorization.

52821287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 52821287 is about 7267.8254657084. The cubic root of 52821287 is about 375.2059005555.

The spelling of 52821287 in words is "fifty-two million, eight hundred twenty-one thousand, two hundred eighty-seven".