1812222413 has 4 divisors (see below), whose sum is σ = 1907602560. Its totient is φ = 1716842268.

The previous prime is 1812222403. The next prime is 1812222431. The reversal of 1812222413 is 3142222181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1812222413 - 2²⁶ = 1745113549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812222403) 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 3 ways as a sum of consecutive naturals, for example, 47690045 + ... + 47690082.

It is an arithmetic number, because the mean of its divisors is an integer number (476900640).

Almost surely, 2^1812222413 is an apocalyptic number.

It is an amenable number.

1812222413 is a deficient number, since it is larger than the sum of its proper divisors (95380147).

1812222413 is an equidigital number, since it uses as much as digits as its factorization.

1812222413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95380146.

The product of its digits is 1536, while the sum is 26.

The square root of 1812222413 is about 42570.2056960029. The cubic root of 1812222413 is about 1219.1874938027.

Adding to 1812222413 its reverse (3142222181), we get a palindrome (4954444594).

The spelling of 1812222413 in words is "one billion, eight hundred twelve million, two hundred twenty-two thousand, four hundred thirteen".