5491551 has 16 divisors (see below), whose sum is σ = 8301440. Its totient is φ = 3201120.

The previous prime is 5491547. The next prime is 5491553. The reversal of 5491551 is 1551945.

It is not a de Polignac number, because 5491551 - 2² = 5491547 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2965 + ... + 4446.

It is an arithmetic number, because the mean of its divisors is an integer number (518840).

Almost surely, 2^5491551 is an apocalyptic number.

5491551 is a deficient number, since it is larger than the sum of its proper divisors (2809889).

5491551 is a wasteful number, since it uses less digits than its factorization.

5491551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446.

The product of its digits is 4500, while the sum is 30.

The square root of 5491551 is about 2343.4058547337. The cubic root of 5491551 is about 176.4269828274.

The spelling of 5491551 in words is "five million, four hundred ninety-one thousand, five hundred fifty-one".