5551820 has 24 divisors (see below), whose sum is σ = 11793600. Its totient is φ = 2195072.

The previous prime is 5551807. The next prime is 5551829. The reversal of 5551820 is 281555.

It is a self number, because there is not a number n which added to its sum of digits gives 5551820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221 + ... + 3339.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^5551820 is an apocalyptic number.

It is an amenable number.

5551820 is an abundant number, since it is smaller than the sum of its proper divisors (6241780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5551820 is a wasteful number, since it uses less digits than its factorization.

5551820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 5551820 is about 2356.2300397033. The cubic root of 5551820 is about 177.0700564287.

The spelling of 5551820 in words is "five million, five hundred fifty-one thousand, eight hundred twenty".