31211131304 has 8 divisors (see below), whose sum is σ = 58520871210. Its totient is φ = 15605565648.

The previous prime is 31211131291. The next prime is 31211131313. The reversal of 31211131304 is 40313111213.

It can be written as a sum of positive squares in only one way, i.e., 31198156900 + 12974404 = 176630^2 + 3602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×31211131304³ (a number of 32 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 1950695699 + ... + 1950695714.

Almost surely, 2^31211131304 is an apocalyptic number.

It is an amenable number.

31211131304 is a deficient number, since it is larger than the sum of its proper divisors (27309739906).

31211131304 is a wasteful number, since it uses less digits than its factorization.

31211131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901391419 (or 3901391415 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31211131304 its reverse (40313111213), we get a palindrome (71524242517).

The spelling of 31211131304 in words is "thirty-one billion, two hundred eleven million, one hundred thirty-one thousand, three hundred four".