5551181 has 4 divisors (see below), whose sum is σ = 5558364. Its totient is φ = 5544000.

The previous prime is 5551159. The next prime is 5551187. The reversal of 5551181 is 1811555.

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 2128681 + 3422500 = 1459^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551181 - 2¹⁰ = 5550157 is a prime.

It is a super-2 number, since 2×5551181² = 61631220989522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5551181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551187) 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, 2270 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (1389591).

Almost surely, 2^5551181 is an apocalyptic number.

It is an amenable number.

5551181 is a deficient number, since it is larger than the sum of its proper divisors (7183).

5551181 is an equidigital number, since it uses as much as digits as its factorization.

5551181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 1000, while the sum is 26.

The square root of 5551181 is about 2356.0944378356. The cubic root of 5551181 is about 177.0632627341.

The spelling of 5551181 in words is "five million, five hundred fifty-one thousand, one hundred eighty-one".