3128228213 has 4 divisors (see below), whose sum is σ = 3412612608. Its totient is φ = 2843843820.

The previous prime is 3128228189. The next prime is 3128228261.

3128228213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128228213 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 3128228213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3128222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142192181 + ... + 142192202.

It is an arithmetic number, because the mean of its divisors is an integer number (853153152).

Almost surely, 2^3128228213 is an apocalyptic number.

It is an amenable number.

3128228213 is a deficient number, since it is larger than the sum of its proper divisors (284384395).

3128228213 is a wasteful number, since it uses less digits than its factorization.

3128228213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284384394.

The product of its digits is 9216, while the sum is 32.

The square root of 3128228213 is about 55930.5659992816. The cubic root of 3128228213 is about 1462.5121279633.

It can be divided in two parts, 31282 and 28213, that added together give a palindrome (59495).

The spelling of 3128228213 in words is "three billion, one hundred twenty-eight million, two hundred twenty-eight thousand, two hundred thirteen".