5558981 has 4 divisors (see below), whose sum is σ = 5750700. Its totient is φ = 5367264.

The previous prime is 5558977. The next prime is 5558999. The reversal of 5558981 is 1898555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2464900 + 3094081 = 1570^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 5558981 - 2² = 5558977 is a prime.

It is a super-2 number, since 2×5558981² = 61804539516722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5558941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95816 + ... + 95873.

It is an arithmetic number, because the mean of its divisors is an integer number (1437675).

Almost surely, 2^5558981 is an apocalyptic number.

It is an amenable number.

5558981 is a deficient number, since it is larger than the sum of its proper divisors (191719).

5558981 is a wasteful number, since it uses less digits than its factorization.

5558981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191718.

The product of its digits is 72000, while the sum is 41.

The square root of 5558981 is about 2357.7491384793. The cubic root of 5558981 is about 177.1461548306.

The spelling of 5558981 in words is "five million, five hundred fifty-eight thousand, nine hundred eighty-one".