552121681 has 2 divisors, whose sum is σ = 552121682. Its totient is φ = 552121680.

The previous prime is 552121667. The next prime is 552121709. The reversal of 552121681 is 186121255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398361681 + 153760000 = 19959^2 + 12400^2 .

It is a cyclic number.

It is not a de Polignac number, because 552121681 - 2⁵ = 552121649 is a prime.

It is a super-2 number, since 2×552121681² = 609676701260531522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (552121181) 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, 276060840 + 276060841.

It is an arithmetic number, because the mean of its divisors is an integer number (276060841).

Almost surely, 2^552121681 is an apocalyptic number.

It is an amenable number.

552121681 is a deficient number, since it is larger than the sum of its proper divisors (1).

552121681 is an equidigital number, since it uses as much as digits as its factorization.

552121681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 31.

The square root of 552121681 is about 23497.2696498976. The cubic root of 552121681 is about 820.3734571937.

The spelling of 552121681 in words is "five hundred fifty-two million, one hundred twenty-one thousand, six hundred eighty-one".