1812220233 has 8 divisors (see below), whose sum is σ = 2424014688. Its totient is φ = 1204286304.

The previous prime is 1812220217. The next prime is 1812220253. The reversal of 1812220233 is 3320222181.

It is a happy number.

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

It is not a de Polignac number, because 1812220233 - 2⁴ = 1812220217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1812220253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964035 + ... + 965912.

It is an arithmetic number, because the mean of its divisors is an integer number (303001836).

Almost surely, 2^1812220233 is an apocalyptic number.

It is an amenable number.

1812220233 is a deficient number, since it is larger than the sum of its proper divisors (611794455).

1812220233 is a wasteful number, since it uses less digits than its factorization.

1812220233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930263.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1812220233 is about 42570.1800912329. The cubic root of 1812220233 is about 1219.1870049315.

The spelling of 1812220233 in words is "one billion, eight hundred twelve million, two hundred twenty thousand, two hundred thirty-three".