31081313061 has 16 divisors (see below), whose sum is σ = 48755001600. Its totient is φ = 19502000064.

The previous prime is 31081313059. The next prime is 31081313069. The reversal of 31081313061 is 16031318013.

It is not a de Polignac number, because 31081313061 - 2¹ = 31081313059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31081313069) 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 15 ways as a sum of consecutive naturals, for example, 33857181 + ... + 33858098.

It is an arithmetic number, because the mean of its divisors is an integer number (3047187600).

Almost surely, 2^31081313061 is an apocalyptic number.

It is an amenable number.

31081313061 is a deficient number, since it is larger than the sum of its proper divisors (17673688539).

31081313061 is a wasteful number, since it uses less digits than its factorization.

31081313061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67715305 (or 67715299 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 31081313061 in words is "thirty-one billion, eighty-one million, three hundred thirteen thousand, sixty-one".