1817162121 has 8 divisors (see below), whose sum is σ = 2423727360. Its totient is φ = 1211019152.

The previous prime is 1817162059. The next prime is 1817162129. The reversal of 1817162121 is 1212617181.

1817162121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1817162121 - 2⁶ = 1817162057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1817162129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95385 + ... + 112838.

It is an arithmetic number, because the mean of its divisors is an integer number (302965920).

Almost surely, 2^1817162121 is an apocalyptic number.

It is an amenable number.

1817162121 is a deficient number, since it is larger than the sum of its proper divisors (606565239).

1817162121 is a wasteful number, since it uses less digits than its factorization.

1817162121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211135.

The product of its digits is 1344, while the sum is 30.

The square root of 1817162121 is about 42628.1845848495. The cubic root of 1817162121 is about 1220.2942318641.

The spelling of 1817162121 in words is "one billion, eight hundred seventeen million, one hundred sixty-two thousand, one hundred twenty-one".