52002721 has 2 divisors, whose sum is σ = 52002722. Its totient is φ = 52002720.

The previous prime is 52002707. The next prime is 52002733. The reversal of 52002721 is 12720025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 6305121 = 6760^2 + 2511^2 .

It is a cyclic number.

It is not a de Polignac number, because 52002721 - 2¹¹ = 52000673 is a prime.

It is not a weakly prime, because it can be changed into another prime (52002121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26001360 + 26001361.

It is an arithmetic number, because the mean of its divisors is an integer number (26001361).

Almost surely, 2^52002721 is an apocalyptic number.

It is an amenable number.

52002721 is a deficient number, since it is larger than the sum of its proper divisors (1).

52002721 is an equidigital number, since it uses as much as digits as its factorization.

52002721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 52002721 is about 7211.2912158642. The cubic root of 52002721 is about 373.2576259290.

Adding to 52002721 its reverse (12720025), we get a palindrome (64722746).

It can be divided in two parts, 5200 and 2721, that added together give a square (7921 = 89²).

The spelling of 52002721 in words is "fifty-two million, two thousand, seven hundred twenty-one".