2291521928 has 32 divisors (see below), whose sum is σ = 4318183200. Its totient is φ = 1140023808.

The previous prime is 2291521907. The next prime is 2291521949. The reversal of 2291521928 is 8291251922.

It is an interprime number because it is at equal distance from previous prime (2291521907) and next prime (2291521949).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039975 + ... + 2041097.

It is an arithmetic number, because the mean of its divisors is an integer number (134943225).

Almost surely, 2^2291521928 is an apocalyptic number.

It is an amenable number.

2291521928 is a deficient number, since it is larger than the sum of its proper divisors (2026661272).

2291521928 is a wasteful number, since it uses less digits than its factorization.

2291521928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2177 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 2291521928 is about 47869.8436178770. The cubic root of 2291521928 is about 1318.3822253103.

The spelling of 2291521928 in words is "two billion, two hundred ninety-one million, five hundred twenty-one thousand, nine hundred twenty-eight".