5541991 has 8 divisors (see below), whose sum is σ = 6821024. Its totient is φ = 4384800.

The previous prime is 5541979. The next prime is 5542001. The reversal of 5541991 is 1991455.

It is a happy number.

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

It is not a de Polignac number, because 5541991 - 2⁵ = 5541959 is a prime.

5541991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5541931) 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, 30360 + ... + 30541.

It is an arithmetic number, because the mean of its divisors is an integer number (852628).

Almost surely, 2^5541991 is an apocalyptic number.

5541991 is a deficient number, since it is larger than the sum of its proper divisors (1279033).

5541991 is a wasteful number, since it uses less digits than its factorization.

5541991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60921.

The product of its digits is 8100, while the sum is 34.

The square root of 5541991 is about 2354.1433686163. The cubic root of 5541991 is about 176.9654991434.

The spelling of 5541991 in words is "five million, five hundred forty-one thousand, nine hundred ninety-one".