3081218133 has 8 divisors (see below), whose sum is σ = 4695189568. Its totient is φ = 1760696064.

The previous prime is 3081218131. The next prime is 3081218149. The reversal of 3081218133 is 3318121803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3081218133 - 2¹ = 3081218131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3081218133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081218131) 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, 73362316 + ... + 73362357.

It is an arithmetic number, because the mean of its divisors is an integer number (586898696).

Almost surely, 2^3081218133 is an apocalyptic number.

It is an amenable number.

3081218133 is a deficient number, since it is larger than the sum of its proper divisors (1613971435).

3081218133 is a wasteful number, since it uses less digits than its factorization.

3081218133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146724683.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 3081218133 is about 55508.7212336944. The cubic root of 3081218133 is about 1455.1490552414.

Adding to 3081218133 its reverse (3318121803), we get a palindrome (6399339936).

The spelling of 3081218133 in words is "three billion, eighty-one million, two hundred eighteen thousand, one hundred thirty-three".