2151565928 has 64 divisors (see below), whose sum is σ = 4307558400. Its totient is φ = 1004633280.

The previous prime is 2151565919. The next prime is 2151565939. The reversal of 2151565928 is 8295651512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4381763 + ... + 4382253.

It is an arithmetic number, because the mean of its divisors is an integer number (67305600).

Almost surely, 2^2151565928 is an apocalyptic number.

It is an amenable number.

2151565928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2151565928 is a wasteful number, since it uses less digits than its factorization.

2151565928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 866 counting only the distinct ones).

The product of its digits is 216000, while the sum is 44.

The square root of 2151565928 is about 46384.9752398339. The cubic root of 2151565928 is about 1290.9761511645.

The spelling of 2151565928 in words is "two billion, one hundred fifty-one million, five hundred sixty-five thousand, nine hundred twenty-eight".