31868105 has 12 divisors (see below), whose sum is σ = 38994060. Its totient is φ = 25002432.

The previous prime is 31868101. The next prime is 31868171. The reversal of 31868105 is 50186813.

It can be written as a sum of positive squares in 6 ways, for example, as 541696 + 31326409 = 736^2 + 5597^2 .

It is not a de Polignac number, because 31868105 - 2² = 31868101 is a prime.

It is a super-2 number, since 2×31868105² = 2031152232582050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31868101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12911 + ... + 15179.

It is an arithmetic number, because the mean of its divisors is an integer number (3249505).

Almost surely, 2^31868105 is an apocalyptic number.

It is an amenable number.

31868105 is a deficient number, since it is larger than the sum of its proper divisors (7125955).

31868105 is an equidigital number, since it uses as much as digits as its factorization.

31868105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 31868105 is about 5645.1842308290. The cubic root of 31868105 is about 317.0434216908.

The spelling of 31868105 in words is "thirty-one million, eight hundred sixty-eight thousand, one hundred five".