552521861 has 2 divisors, whose sum is σ = 552521862. Its totient is φ = 552521860.

The previous prime is 552521839. The next prime is 552521909. The reversal of 552521861 is 168125255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321664225 + 230857636 = 17935^2 + 15194^2 .

It is a cyclic number.

It is not a de Polignac number, because 552521861 - 2²² = 548327557 is a prime.

It is a super-3 number, since 3×552521861³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (552521831) 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, 276260930 + 276260931.

It is an arithmetic number, because the mean of its divisors is an integer number (276260931).

Almost surely, 2^552521861 is an apocalyptic number.

It is an amenable number.

552521861 is a deficient number, since it is larger than the sum of its proper divisors (1).

552521861 is an equidigital number, since it uses as much as digits as its factorization.

552521861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 35.

The square root of 552521861 is about 23505.7835649016. The cubic root of 552521861 is about 820.5716126464.

The spelling of 552521861 in words is "five hundred fifty-two million, five hundred twenty-one thousand, eight hundred sixty-one".