5545551 has 12 divisors (see below), whose sum is σ = 8127896. Its totient is φ = 3360720.

The previous prime is 5545543. The next prime is 5545567. The reversal of 5545551 is 1555455.

It is not a de Polignac number, because 5545551 - 2³ = 5545543 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 (5545531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7276 + ... + 8001.

Almost surely, 2^5545551 is an apocalyptic number.

5545551 is a deficient number, since it is larger than the sum of its proper divisors (2582345).

5545551 is a wasteful number, since it uses less digits than its factorization.

5545551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302 (or 15291 counting only the distinct ones).

The product of its digits is 12500, while the sum is 30.

The square root of 5545551 is about 2354.8993609070. The cubic root of 5545551 is about 177.0033833820.

It can be divided in two parts, 554 and 5551, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 5545551 in words is "five million, five hundred forty-five thousand, five hundred fifty-one".