3345181821 has 40 divisors (see below), whose sum is σ = 5168345600. Its totient is φ = 2153990880.

The previous prime is 3345181793. The next prime is 3345181909. The reversal of 3345181821 is 1281815433.

It is not a de Polignac number, because 3345181821 - 2⁵ = 3345181789 is a prime.

It is a super-2 number, since 2×3345181821² = 22380482831097752082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3345181321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1779360 + ... + 1781238.

It is an arithmetic number, because the mean of its divisors is an integer number (129208640).

Almost surely, 2^3345181821 is an apocalyptic number.

3345181821 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3345181821 is a deficient number, since it is larger than the sum of its proper divisors (1823163779).

3345181821 is a wasteful number, since it uses less digits than its factorization.

3345181821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2622 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 3345181821 is about 57837.5468100092. The cubic root of 3345181821 is about 1495.5694181813.

The spelling of 3345181821 in words is "three billion, three hundred forty-five million, one hundred eighty-one thousand, eight hundred twenty-one".