554841981 has 20 divisors (see below), whose sum is σ = 831015900. Its totient is φ = 368922816.

The previous prime is 554841979. The next prime is 554842019. The reversal of 554841981 is 189148455.

It is a happy number.

554841981 is a `hidden beast` number, since 554 + 8 + 4 + 1 + 98 + 1 = 666.

554841981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 270076356 + 284765625 = 16434^2 + 16875^2 .

It is not a de Polignac number, because 554841981 - 2¹ = 554841979 is a prime.

It is a super-2 number, since 2×554841981² = 615699247760008722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554841961) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22705 + ... + 40313.

It is an arithmetic number, because the mean of its divisors is an integer number (41550795).

Almost surely, 2^554841981 is an apocalyptic number.

It is an amenable number.

554841981 is a deficient number, since it is larger than the sum of its proper divisors (276173919).

554841981 is a wasteful number, since it uses less digits than its factorization.

554841981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18010 (or 18001 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 554841981 is about 23555.0839735289. The cubic root of 554841981 is about 821.7185754068.

The spelling of 554841981 in words is "five hundred fifty-four million, eight hundred forty-one thousand, nine hundred eighty-one".