5533981 has 8 divisors (see below), whose sum is σ = 5662584. Its totient is φ = 5406720.

The previous prime is 5533973. The next prime is 5534003. The reversal of 5533981 is 1893355.

It can be written as a sum of positive squares in 4 ways, for example, as 737881 + 4796100 = 859^2 + 2190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5533981 - 2³ = 5533973 is a prime.

It is a super-2 number, since 2×5533981² = 61249891416722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5533901) 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 7 ways as a sum of consecutive naturals, for example, 15501 + ... + 15853.

It is an arithmetic number, because the mean of its divisors is an integer number (707823).

Almost surely, 2^5533981 is an apocalyptic number.

It is an amenable number.

5533981 is a deficient number, since it is larger than the sum of its proper divisors (128603).

5533981 is a wasteful number, since it uses less digits than its factorization.

5533981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 16200, while the sum is 34.

The square root of 5533981 is about 2352.4414976785. The cubic root of 5533981 is about 176.8802002492.

The spelling of 5533981 in words is "five million, five hundred thirty-three thousand, nine hundred eighty-one".