31142113 has 8 divisors (see below), whose sum is σ = 33067008. Its totient is φ = 29227584.

The previous prime is 31142101. The next prime is 31142117. The reversal of 31142113 is 31124113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31142113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31142117) 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 7 ways as a sum of consecutive naturals, for example, 4120 + ... + 8902.

It is an arithmetic number, because the mean of its divisors is an integer number (4133376).

Almost surely, 2^31142113 is an apocalyptic number.

It is an amenable number.

31142113 is a deficient number, since it is larger than the sum of its proper divisors (1924895).

31142113 is a wasteful number, since it uses less digits than its factorization.

31142113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its digits is 72, while the sum is 16.

The square root of 31142113 is about 5580.5118940828. The cubic root of 31142113 is about 314.6173669284.

Adding to 31142113 its reverse (31124113), we get a palindrome (62266226).

It can be divided in two parts, 311 and 42113, that added together give a palindrome (42424).

The spelling of 31142113 in words is "thirty-one million, one hundred forty-two thousand, one hundred thirteen".