31540010105 has 4 divisors (see below), whose sum is σ = 37848012132. Its totient is φ = 25232008080.

The previous prime is 31540010093. The next prime is 31540010123. The reversal of 31540010105 is 50101004513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50101004513 = 7 ⋅7157286359.

It can be written as a sum of positive squares in 2 ways, for example, as 5307996736 + 26232013369 = 72856^2 + 161963^2 .

It is not a de Polignac number, because 31540010105 - 2⁶ = 31540010041 is a prime.

It is a super-2 number, since 2×31540010105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3154001006 + ... + 3154001015.

It is an arithmetic number, because the mean of its divisors is an integer number (9462003033).

Almost surely, 2^31540010105 is an apocalyptic number.

It is an amenable number.

31540010105 is a deficient number, since it is larger than the sum of its proper divisors (6308002027).

31540010105 is an equidigital number, since it uses as much as digits as its factorization.

31540010105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308002026.

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 31540010105 its reverse (50101004513), we get a palindrome (81641014618).

The spelling of 31540010105 in words is "thirty-one billion, five hundred forty million, ten thousand, one hundred five".