2931021009 has 48 divisors (see below), whose sum is σ = 4900896000. Its totient is φ = 1653395328.

The previous prime is 2931020993. The next prime is 2931021013. The reversal of 2931021009 is 9001201392.

It is not a de Polignac number, because 2931021009 - 2⁴ = 2931020993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2931021809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2395972 + ... + 2397194.

It is an arithmetic number, because the mean of its divisors is an integer number (102102000).

Almost surely, 2^2931021009 is an apocalyptic number.

It is an amenable number.

2931021009 is a deficient number, since it is larger than the sum of its proper divisors (1969874991).

2931021009 is a wasteful number, since it uses less digits than its factorization.

2931021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2931021009 is about 54138.9047635801. The cubic root of 2931021009 is about 1431.1098705978.

The spelling of 2931021009 in words is "two billion, nine hundred thirty-one million, twenty-one thousand, nine".