31080810105 has 40 divisors (see below), whose sum is σ = 55922545800. Its totient is φ = 16514751744.

The previous prime is 31080810083. The next prime is 31080810107. The reversal of 31080810105 is 50101808013.

It can be written as a sum of positive squares in 4 ways, for example, as 583077609 + 30497732496 = 24147^2 + 174636^2 .

It is not a de Polignac number, because 31080810105 - 2⁵ = 31080810073 is a prime.

It is a super-2 number, since 2×31080810105² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31080810107) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33700 + ... + 251589.

It is an arithmetic number, because the mean of its divisors is an integer number (1398063645).

Almost surely, 2^31080810105 is an apocalyptic number.

It is an amenable number.

31080810105 is a deficient number, since it is larger than the sum of its proper divisors (24841735695).

31080810105 is a wasteful number, since it uses less digits than its factorization.

31080810105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285575 (or 285566 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The spelling of 31080810105 in words is "thirty-one billion, eighty million, eight hundred ten thousand, one hundred five".