2154223 has 4 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 2027488.

The previous prime is 2154209. The next prime is 2154227. The reversal of 2154223 is 3224512.

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

It is a de Polignac number, because none of the positive numbers 2^k-2154223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154223.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 63343 + ... + 63376.

It is an arithmetic number, because the mean of its divisors is an integer number (570240).

2^2154223 is an apocalyptic number.

2154223 is a deficient number, since it is larger than the sum of its proper divisors (126737).

2154223 is a wasteful number, since it uses less digits than its factorization.

2154223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126736.

The product of its digits is 480, while the sum is 19.

The square root of 2154223 is about 1467.7271544807. The cubic root of 2154223 is about 129.1507362016.

Adding to 2154223 its reverse (3224512), we get a palindrome (5378735).

The spelling of 2154223 in words is "two million, one hundred fifty-four thousand, two hundred twenty-three".