5551899 has 4 divisors (see below), whose sum is σ = 7402536. Its totient is φ = 3701264.

The previous prime is 5551879. The next prime is 5551919. The reversal of 5551899 is 9981555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5551879) and next prime (5551919).

It is a cyclic number.

It is not a de Polignac number, because 5551899 - 2⁵ = 5551867 is a prime.

It is a D-number.

5551899 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5551899.

It is not an unprimeable number, because it can be changed into a prime (5551829) 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, 925314 + ... + 925319.

It is an arithmetic number, because the mean of its divisors is an integer number (1850634).

Almost surely, 2^5551899 is an apocalyptic number.

5551899 is a deficient number, since it is larger than the sum of its proper divisors (1850637).

5551899 is a wasteful number, since it uses less digits than its factorization.

5551899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850636.

The product of its digits is 81000, while the sum is 42.

The square root of 5551899 is about 2356.2468037114. The cubic root of 5551899 is about 177.0708963015.

The spelling of 5551899 in words is "five million, five hundred fifty-one thousand, eight hundred ninety-nine".