2139223 has 4 divisors (see below), whose sum is σ = 2150280. Its totient is φ = 2128168.

The previous prime is 2139211. The next prime is 2139227. The reversal of 2139223 is 3229312.

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

It is a cyclic number.

It is not a de Polignac number, because 2139223 - 2¹⁷ = 2008151 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2139194 and 2139203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139227) 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, 5233 + ... + 5626.

It is an arithmetic number, because the mean of its divisors is an integer number (537570).

2^2139223 is an apocalyptic number.

2139223 is a deficient number, since it is larger than the sum of its proper divisors (11057).

2139223 is a wasteful number, since it uses less digits than its factorization.

2139223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11056.

The product of its digits is 648, while the sum is 22.

The square root of 2139223 is about 1462.6082865894. The cubic root of 2139223 is about 128.8502759824.

The spelling of 2139223 in words is "two million, one hundred thirty-nine thousand, two hundred twenty-three".