5540551 has 4 divisors (see below), whose sum is σ = 5548752. Its totient is φ = 5532352.

The previous prime is 5540531. The next prime is 5540573. The reversal of 5540551 is 1550455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1550455 = 5 ⋅310091.

It is a cyclic number.

It is not a de Polignac number, because 5540551 - 2⁵ = 5540519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5540531) 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, 2986 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (1387188).

Almost surely, 2^5540551 is an apocalyptic number.

5540551 is a deficient number, since it is larger than the sum of its proper divisors (8201).

5540551 is an equidigital number, since it uses as much as digits as its factorization.

5540551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 5540551 is about 2353.8375050118. The cubic root of 5540551 is about 176.9501705732.

The spelling of 5540551 in words is "five million, five hundred forty thousand, five hundred fifty-one".