31142875 has 8 divisors (see below), whose sum is σ = 38866464. Its totient is φ = 24914200.

The previous prime is 31142869. The next prime is 31142893. The reversal of 31142875 is 57824113.

It is not a de Polignac number, because 31142875 - 2¹⁹ = 30618587 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124447 + ... + 124696.

It is an arithmetic number, because the mean of its divisors is an integer number (4858308).

Almost surely, 2^31142875 is an apocalyptic number.

31142875 is a deficient number, since it is larger than the sum of its proper divisors (7723589).

31142875 is an equidigital number, since it uses as much as digits as its factorization.

31142875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249158 (or 249148 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 31142875 is about 5580.5801669719. The cubic root of 31142875 is about 314.6199329764.

Adding to 31142875 its reverse (57824113), we get a palindrome (88966988).

The spelling of 31142875 in words is "thirty-one million, one hundred forty-two thousand, eight hundred seventy-five".