31712105 has 16 divisors (see below), whose sum is σ = 38910144. Its totient is φ = 24805440.

The previous prime is 31712099. The next prime is 31712129. The reversal of 31712105 is 50121713.

It is not a de Polignac number, because 31712105 - 2⁶ = 31712041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60374 + ... + 60896.

It is an arithmetic number, because the mean of its divisors is an integer number (2431884).

Almost surely, 2^31712105 is an apocalyptic number.

It is an amenable number.

31712105 is a deficient number, since it is larger than the sum of its proper divisors (7198039).

31712105 is a wasteful number, since it uses less digits than its factorization.

31712105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 31712105 is about 5631.3501933373. The cubic root of 31712105 is about 316.5252474105.

Adding to 31712105 its reverse (50121713), we get a palindrome (81833818).

It can be divided in two parts, 3 and 1712105, that multiplied together give a palindrome (5136315).

The spelling of 31712105 in words is "thirty-one million, seven hundred twelve thousand, one hundred five".