31142827 has 8 divisors (see below), whose sum is σ = 33393600. Its totient is φ = 28938624.

The previous prime is 31142807. The next prime is 31142831. The reversal of 31142827 is 72824113.

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

It is not a de Polignac number, because 31142827 - 2¹¹ = 31140779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31142795 and 31142804.

It is not an unprimeable number, because it can be changed into a prime (31142807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10252 + ... + 12937.

It is an arithmetic number, because the mean of its divisors is an integer number (4174200).

Almost surely, 2^31142827 is an apocalyptic number.

31142827 is a deficient number, since it is larger than the sum of its proper divisors (2250773).

31142827 is a wasteful number, since it uses less digits than its factorization.

31142827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23285.

The product of its digits is 2688, while the sum is 28.

The square root of 31142827 is about 5580.5758663421. The cubic root of 31142827 is about 314.6197713368.

The spelling of 31142827 in words is "thirty-one million, one hundred forty-two thousand, eight hundred twenty-seven".