1881813113 has 8 divisors (see below), whose sum is σ = 2012237640. Its totient is φ = 1753580800.

The previous prime is 1881813107. The next prime is 1881813127. The reversal of 1881813113 is 3113181881.

It can be written as a sum of positive squares in 4 ways, for example, as 1436940649 + 444872464 = 37907^2 + 21092^2 .

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 1881813113 - 2⁶ = 1881813049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1881813413) 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 7 ways as a sum of consecutive naturals, for example, 546278 + ... + 549711.

It is an arithmetic number, because the mean of its divisors is an integer number (251529705).

Almost surely, 2^1881813113 is an apocalyptic number.

It is an amenable number.

1881813113 is a deficient number, since it is larger than the sum of its proper divisors (130424527).

1881813113 is a wasteful number, since it uses less digits than its factorization.

1881813113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096107.

The product of its digits is 4608, while the sum is 35.

The square root of 1881813113 is about 43379.8699052913. The cubic root of 1881813113 is about 1234.5977945790.

Adding to 1881813113 its reverse (3113181881), we get a palindrome (4994994994).

The spelling of 1881813113 in words is "one billion, eight hundred eighty-one million, eight hundred thirteen thousand, one hundred thirteen".