6815225428 has 24 divisors (see below), whose sum is σ = 13041108864. Its totient is φ = 3090633600.

The previous prime is 6815225423. The next prime is 6815225429. The reversal of 6815225428 is 8245225186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815225423) 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, 160725 + ... + 198652.

It is an arithmetic number, because the mean of its divisors is an integer number (543379536).

Almost surely, 2^6815225428 is an apocalyptic number.

It is an amenable number.

6815225428 is a deficient number, since it is larger than the sum of its proper divisors (6225883436).

6815225428 is a wasteful number, since it uses less digits than its factorization.

6815225428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359823 (or 359821 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The square root of 6815225428 is about 82554.3786119186. The cubic root of 6815225428 is about 1895.9493972650.

The spelling of 6815225428 in words is "six billion, eight hundred fifteen million, two hundred twenty-five thousand, four hundred twenty-eight".