5550551 has 4 divisors (see below), whose sum is σ = 5877072. Its totient is φ = 5224032.

The previous prime is 5550547. The next prime is 5550553. The reversal of 5550551 is 1550555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1550555 = 5 ⋅310111.

It is not a de Polignac number, because 5550551 - 2² = 5550547 is a prime.

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 5550551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5550553) 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 3 ways as a sum of consecutive naturals, for example, 163235 + ... + 163268.

It is an arithmetic number, because the mean of its divisors is an integer number (1469268).

Almost surely, 2^5550551 is an apocalyptic number.

5550551 is a deficient number, since it is larger than the sum of its proper divisors (326521).

5550551 is a wasteful number, since it uses less digits than its factorization.

5550551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326520.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 5550551 is about 2355.9607382128. The cubic root of 5550551 is about 177.0565642150.

The spelling of 5550551 in words is "five million, five hundred fifty thousand, five hundred fifty-one".