2218231 has 8 divisors (see below), whose sum is σ = 2348720. Its totient is φ = 2089152.

The previous prime is 2218219. The next prime is 2218277. The reversal of 2218231 is 1328122.

2218231 = T₂₅₀ + T₂₅₁ + ... + T₃₀₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2218231 - 2⁵ = 2218199 is a prime.

It is a super-2 number, since 2×2218231² = 9841097538722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2218199 and 2218208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5761 + ... + 6133.

It is an arithmetic number, because the mean of its divisors is an integer number (293590).

2^2218231 is an apocalyptic number.

2218231 is a deficient number, since it is larger than the sum of its proper divisors (130489).

2218231 is a wasteful number, since it uses less digits than its factorization.

2218231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its digits is 192, while the sum is 19.

The square root of 2218231 is about 1489.3726867376. The cubic root of 2218231 is about 130.4174156861.

The spelling of 2218231 in words is "two million, two hundred eighteen thousand, two hundred thirty-one".