5551805 has 16 divisors (see below), whose sum is σ = 7680000. Its totient is φ = 3773952.

The previous prime is 5551801. The next prime is 5551807. The reversal of 5551805 is 5081555.

It is not a de Polignac number, because 5551805 - 2² = 5551801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3821 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (480000).

Almost surely, 2^5551805 is an apocalyptic number.

It is an amenable number.

5551805 is a deficient number, since it is larger than the sum of its proper divisors (2128195).

5551805 is a wasteful number, since it uses less digits than its factorization.

5551805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388.

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 5551805 is about 2356.2268566503. The cubic root of 5551805 is about 177.0698969582.

It can be divided in two parts, 5551 and 805, that multiplied together give a triangular number (4468555 = T₂₉₈₉).

The spelling of 5551805 in words is "five million, five hundred fifty-one thousand, eight hundred five".