552000721 has 2 divisors, whose sum is σ = 552000722. Its totient is φ = 552000720.

The previous prime is 552000719. The next prime is 552000767. The reversal of 552000721 is 127000255.

552000721 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 can be written as a sum of positive squares in only one way, i.e., 514790721 + 37210000 = 22689^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 552000721 - 2¹ = 552000719 is a prime.

Together with 552000719, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 552000692 and 552000701.

It is not a weakly prime, because it can be changed into another prime (552000781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276000360 + 276000361.

It is an arithmetic number, because the mean of its divisors is an integer number (276000361).

Almost surely, 2^552000721 is an apocalyptic number.

It is an amenable number.

552000721 is a deficient number, since it is larger than the sum of its proper divisors (1).

552000721 is an equidigital number, since it uses as much as digits as its factorization.

552000721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 552000721 is about 23494.6955928354. The cubic root of 552000721 is about 820.3135430936.

Adding to 552000721 its reverse (127000255), we get a palindrome (679000976).

The spelling of 552000721 in words is "five hundred fifty-two million, seven hundred twenty-one", and thus it is an aban number.