31105842 has 8 divisors (see below), whose sum is σ = 62211696. Its totient is φ = 10368612.

The previous prime is 31105817. The next prime is 31105843. The reversal of 31105842 is 24850113.

It is a sphenic number, since it is the product of 3 distinct primes.

31105842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31105843) 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 3 ways as a sum of consecutive naturals, for example, 2592148 + ... + 2592159.

It is an arithmetic number, because the mean of its divisors is an integer number (7776462).

Almost surely, 2^31105842 is an apocalyptic number.

31105842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31105842 is a wasteful number, since it uses less digits than its factorization.

31105842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184312.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 31105842 is about 5577.2611558004. The cubic root of 31105842 is about 314.4951752659.

Adding to 31105842 its reverse (24850113), we get a palindrome (55955955).

The spelling of 31105842 in words is "thirty-one million, one hundred five thousand, eight hundred forty-two".