31108242 has 32 divisors (see below), whose sum is σ = 70217280. Its totient is φ = 9101120.

The previous prime is 31108241. The next prime is 31108247. The reversal of 31108242 is 24280113.

It is not an unprimeable number, because it can be changed into a prime (31108241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6213 + ... + 10040.

It is an arithmetic number, because the mean of its divisors is an integer number (2194290).

Almost surely, 2^31108242 is an apocalyptic number.

31108242 is an abundant number, since it is smaller than the sum of its proper divisors (39109038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31108242 is a wasteful number, since it uses less digits than its factorization.

31108242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16298.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 31108242 is about 5577.4763110210. The cubic root of 31108242 is about 314.5032634466.

Adding to 31108242 its reverse (24280113), we get a palindrome (55388355).

The spelling of 31108242 in words is "thirty-one million, one hundred eight thousand, two hundred forty-two".