1800226221 has 8 divisors (see below), whose sum is σ = 2412739200. Its totient is φ = 1193932032.

The previous prime is 1800226163. The next prime is 1800226291. The reversal of 1800226221 is 1226220081.

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

It is not a de Polignac number, because 1800226221 - 2¹⁸ = 1799964077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1800226191 and 1800226200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800226291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554021 + ... + 1555178.

It is an arithmetic number, because the mean of its divisors is an integer number (301592400).

Almost surely, 2^1800226221 is an apocalyptic number.

It is an amenable number.

1800226221 is a deficient number, since it is larger than the sum of its proper divisors (612512979).

1800226221 is a wasteful number, since it uses less digits than its factorization.

1800226221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109395.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1800226221 is about 42429.0728274847. The cubic root of 1800226221 is about 1216.4913570473.

The spelling of 1800226221 in words is "one billion, eight hundred million, two hundred twenty-six thousand, two hundred twenty-one".