52721287 has 2 divisors, whose sum is σ = 52721288. Its totient is φ = 52721286.

The previous prime is 52721113. The next prime is 52721303. The reversal of 52721287 is 78212725.

52721287 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52721287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52721387) 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, 26360643 + 26360644.

It is an arithmetic number, because the mean of its divisors is an integer number (26360644).

Almost surely, 2^52721287 is an apocalyptic number.

52721287 is a deficient number, since it is larger than the sum of its proper divisors (1).

52721287 is an equidigital number, since it uses as much as digits as its factorization.

52721287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 34.

The square root of 52721287 is about 7260.9425696668. The cubic root of 52721287 is about 374.9689740257.

The spelling of 52721287 in words is "fifty-two million, seven hundred twenty-one thousand, two hundred eighty-seven".