3115221428 has 12 divisors (see below), whose sum is σ = 5947240992. Its totient is φ = 1416009720.

The previous prime is 3115221427. The next prime is 3115221443. The reversal of 3115221428 is 8241225113.

It is a happy number.

3115221428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3115221428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3115221427) 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, 35400200 + ... + 35400287.

It is an arithmetic number, because the mean of its divisors is an integer number (495603416).

Almost surely, 2^3115221428 is an apocalyptic number.

It is an amenable number.

3115221428 is a deficient number, since it is larger than the sum of its proper divisors (2832019564).

3115221428 is a wasteful number, since it uses less digits than its factorization.

3115221428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70800502 (or 70800500 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 3115221428 is about 55814.1687029378. The cubic root of 3115221428 is about 1460.4823307862.

The spelling of 3115221428 in words is "three billion, one hundred fifteen million, two hundred twenty-one thousand, four hundred twenty-eight".