2154220 has 24 divisors (see below), whose sum is σ = 4762800. Its totient is φ = 816192.

The previous prime is 2154209. The next prime is 2154227. The reversal of 2154220 is 224512.

2154220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2154194 and 2154203.

It is not an unprimeable number, because it can be changed into a prime (2154227) 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, 2455 + ... + 3214.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

2^2154220 is an apocalyptic number.

2154220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154220 is an abundant number, since it is smaller than the sum of its proper divisors (2608580).

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

2154220 is a wasteful number, since it uses less digits than its factorization.

2154220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697 (or 5695 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2154220 is about 1467.7261324920. The cubic root of 2154220 is about 129.1506762492.

Adding to 2154220 its reverse (224512), we get a palindrome (2378732).

The spelling of 2154220 in words is "two million, one hundred fifty-four thousand, two hundred twenty".