553535981 has 2 divisors, whose sum is σ = 553535982. Its totient is φ = 553535980.

The previous prime is 553535953. The next prime is 553536023. The reversal of 553535981 is 189535355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 540330025 + 13205956 = 23245^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 553535981 - 2¹⁴ = 553519597 is a prime.

It is a super-2 number, since 2×553535981² = 612804164523264722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553531981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276767990 + 276767991.

It is an arithmetic number, because the mean of its divisors is an integer number (276767991).

Almost surely, 2^553535981 is an apocalyptic number.

It is an amenable number.

553535981 is a deficient number, since it is larger than the sum of its proper divisors (1).

553535981 is an equidigital number, since it uses as much as digits as its factorization.

553535981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405000, while the sum is 44.

The square root of 553535981 is about 23527.3453878673. The cubic root of 553535981 is about 821.0733421018.

The spelling of 553535981 in words is "five hundred fifty-three million, five hundred thirty-five thousand, nine hundred eighty-one".