5546551 has 4 divisors (see below), whose sum is σ = 5725504. Its totient is φ = 5367600.

The previous prime is 5546543. The next prime is 5546561. The reversal of 5546551 is 1556455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1556455 = 5 ⋅311291.

It is a cyclic number.

It is not a de Polignac number, because 5546551 - 2³ = 5546543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 178921 = 5546551 / (5 + 5 + 4 + 6 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5546561) 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, 89430 + ... + 89491.

It is an arithmetic number, because the mean of its divisors is an integer number (1431376).

Almost surely, 2^5546551 is an apocalyptic number.

5546551 is a deficient number, since it is larger than the sum of its proper divisors (178953).

5546551 is a wasteful number, since it uses less digits than its factorization.

5546551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178952.

The product of its digits is 15000, while the sum is 31.

The square root of 5546551 is about 2355.1116746346. Note that the first 3 decimals coincide. The cubic root of 5546551 is about 177.0140221051.

The spelling of 5546551 in words is "five million, five hundred forty-six thousand, five hundred fifty-one".