1812220232 has 32 divisors (see below), whose sum is σ = 3549286080. Its totient is φ = 865824960.

The previous prime is 1812220217. The next prime is 1812220253. The reversal of 1812220232 is 2320222181.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 1812220198 and 1812220207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196607 + ... + 205617.

It is an arithmetic number, because the mean of its divisors is an integer number (110915190).

Almost surely, 2^1812220232 is an apocalyptic number.

It is an amenable number.

1812220232 is a deficient number, since it is larger than the sum of its proper divisors (1737065848).

1812220232 is a wasteful number, since it uses less digits than its factorization.

1812220232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10133 (or 10129 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1812220232 is about 42570.1800794876. The cubic root of 1812220232 is about 1219.1870047073.

The spelling of 1812220232 in words is "one billion, eight hundred twelve million, two hundred twenty thousand, two hundred thirty-two".