5538981 has 8 divisors (see below), whose sum is σ = 8440384. Its totient is φ = 3165120.

The previous prime is 5538947. The next prime is 5538989. The reversal of 5538981 is 1898355.

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

It is not a de Polignac number, because 5538981 - 2⁷ = 5538853 is a prime.

It is a super-2 number, since 2×5538981² = 61360621036722, 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 (5538989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131860 + ... + 131901.

It is an arithmetic number, because the mean of its divisors is an integer number (1055048).

Almost surely, 2^5538981 is an apocalyptic number.

It is an amenable number.

5538981 is a deficient number, since it is larger than the sum of its proper divisors (2901403).

5538981 is a wasteful number, since it uses less digits than its factorization.

5538981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263771.

The product of its digits is 43200, while the sum is 39.

The square root of 5538981 is about 2353.5039834256. The cubic root of 5538981 is about 176.9334551471.

The spelling of 5538981 in words is "five million, five hundred thirty-eight thousand, nine hundred eighty-one".