31210320404 has 6 divisors (see below), whose sum is σ = 54618060714. Its totient is φ = 15605160200.

The previous prime is 31210320403. The next prime is 31210320469. The reversal of 31210320404 is 40402301213.

It can be written as a sum of positive squares in only one way, i.e., 20958352900 + 10251967504 = 144770^2 + 101252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210320403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3901290047 + ... + 3901290054.

It is an arithmetic number, because the mean of its divisors is an integer number (9103010119).

Almost surely, 2^31210320404 is an apocalyptic number.

It is an amenable number.

31210320404 is a deficient number, since it is larger than the sum of its proper divisors (23407740310).

31210320404 is a wasteful number, since it uses less digits than its factorization.

31210320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7802580105 (or 7802580103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31210320404 its reverse (40402301213), we get a palindrome (71612621617).

The spelling of 31210320404 in words is "thirty-one billion, two hundred ten million, three hundred twenty thousand, four hundred four".