31313130993 has 12 divisors (see below), whose sum is σ = 45234858240. Its totient is φ = 20873214456.

The previous prime is 31313130917. The next prime is 31313130997. The reversal of 31313130993 is 39903131313.

31313130993 is a `hidden beast` number, since 31 + 313 + 1 + 309 + 9 + 3 = 666.

It is not a de Polignac number, because 31313130993 - 2¹³ = 31313122801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31313130997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91521 + ... + 266462.

It is an arithmetic number, because the mean of its divisors is an integer number (3769571520).

Almost surely, 2^31313130993 is an apocalyptic number.

It is an amenable number.

31313130993 is a deficient number, since it is larger than the sum of its proper divisors (13921727247).

31313130993 is a wasteful number, since it uses less digits than its factorization.

31313130993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367708 (or 367705 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 36.

The spelling of 31313130993 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty thousand, nine hundred ninety-three".