2231818916 has 12 divisors (see below), whose sum is σ = 3919784988. Its totient is φ = 1111880352.

The previous prime is 2231818891. The next prime is 2231818933. The reversal of 2231818916 is 6198181322.

It can be written as a sum of positive squares in 2 ways, for example, as 521665600 + 1710153316 = 22840^2 + 41354^2 .

It is a super-3 number, since 3×2231818916³ (a number of 29 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 1006031 + ... + 1008246.

It is an arithmetic number, because the mean of its divisors is an integer number (326648749).

Almost surely, 2^2231818916 is an apocalyptic number.

It is an amenable number.

2231818916 is a deficient number, since it is larger than the sum of its proper divisors (1687966072).

2231818916 is a wasteful number, since it uses less digits than its factorization.

2231818916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014558 (or 2014556 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 2231818916 is about 47242.1307309482. The cubic root of 2231818916 is about 1306.8316720623.

The spelling of 2231818916 in words is "two billion, two hundred thirty-one million, eight hundred eighteen thousand, nine hundred sixteen".