31106809437 has 16 divisors (see below), whose sum is σ = 45449177088. Its totient is φ = 18768066480.

The previous prime is 31106809339. The next prime is 31106809441. The reversal of 31106809437 is 73490860113.

It is not a de Polignac number, because 31106809437 - 2¹⁵ = 31106776669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31106809837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106163 + ... + 2120880.

It is an arithmetic number, because the mean of its divisors is an integer number (2840573568).

Almost surely, 2^31106809437 is an apocalyptic number.

It is an amenable number.

31106809437 is a deficient number, since it is larger than the sum of its proper divisors (14342367651).

31106809437 is a wasteful number, since it uses less digits than its factorization.

31106809437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4227280.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 31106809437 in words is "thirty-one billion, one hundred six million, eight hundred nine thousand, four hundred thirty-seven".