5623821 has 48 divisors (see below), whose sum is σ = 10108800. Its totient is φ = 2939904.

The previous prime is 5623811. The next prime is 5623823. The reversal of 5623821 is 1283265.

It is not a de Polignac number, because 5623821 - 2⁵ = 5623789 is a prime.

5623821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5623823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63145 + ... + 63233.

It is an arithmetic number, because the mean of its divisors is an integer number (210600).

Almost surely, 2^5623821 is an apocalyptic number.

5623821 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5623821 is a deficient number, since it is larger than the sum of its proper divisors (4484979).

5623821 is a wasteful number, since it uses less digits than its factorization.

5623821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 175 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 5623821 is about 2371.4596770765. The cubic root of 5623821 is about 177.8322389423.

The spelling of 5623821 in words is "five million, six hundred twenty-three thousand, eight hundred twenty-one".