3128283128281 has 4 divisors (see below), whose sum is σ = 3128413048272. Its totient is φ = 3128153208292.

The previous prime is 3128283128273. The next prime is 3128283128293. The reversal of 3128283128281 is 1828213828213.

It is a happy number.

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 not a de Polignac number, because 3128283128281 - 2³ = 3128283128273 is a prime.

It is a super-2 number, since 2×3128283128281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128283122281) 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, 64923871 + ... + 64972036.

It is an arithmetic number, because the mean of its divisors is an integer number (782103262068).

Almost surely, 2^{3128283128281} is an apocalyptic number.

It is an amenable number.

3128283128281 is a deficient number, since it is larger than the sum of its proper divisors (129919991).

3128283128281 is a wasteful number, since it uses less digits than its factorization.

3128283128281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129919990.

The product of its digits is 589824, while the sum is 49.

The spelling of 3128283128281 in words is "three trillion, one hundred twenty-eight billion, two hundred eighty-three million, one hundred twenty-eight thousand, two hundred eighty-one".