2391021016 has 16 divisors (see below), whose sum is σ = 4484764800. Its totient is φ = 1195083744.

The previous prime is 2391021011. The next prime is 2391021023. The reversal of 2391021016 is 6101201932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391021011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28875 + ... + 74938.

It is an arithmetic number, because the mean of its divisors is an integer number (280297800).

Almost surely, 2^2391021016 is an apocalyptic number.

It is an amenable number.

2391021016 is a deficient number, since it is larger than the sum of its proper divisors (2093743784).

2391021016 is a wasteful number, since it uses less digits than its factorization.

2391021016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106698 (or 106694 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2391021016 is about 48898.0676100805. The cubic root of 2391021016 is about 1337.1941392319.

Adding to 2391021016 its reverse (6101201932), we get a palindrome (8492222948).

The spelling of 2391021016 in words is "two billion, three hundred ninety-one million, twenty-one thousand, sixteen".