731020012 has 12 divisors (see below), whose sum is σ = 1293659640. Its totient is φ = 361402976.

The previous prime is 731019997. The next prime is 731020019. The reversal of 731020012 is 210020137.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (731020019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026358 + ... + 1027069.

It is an arithmetic number, because the mean of its divisors is an integer number (107804970).

Almost surely, 2^731020012 is an apocalyptic number.

It is an amenable number.

731020012 is a deficient number, since it is larger than the sum of its proper divisors (562639628).

731020012 is a wasteful number, since it uses less digits than its factorization.

731020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053520 (or 2053518 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 731020012 is about 27037.3817519374. The cubic root of 731020012 is about 900.8305140299.

Adding to 731020012 its reverse (210020137), we get a palindrome (941040149).

The spelling of 731020012 in words is "seven hundred thirty-one million, twenty thousand, twelve".