31871041 has 4 divisors (see below), whose sum is σ = 32612272. Its totient is φ = 31129812.

The previous prime is 31871017. The next prime is 31871051. The reversal of 31871041 is 14017813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14017813 = 167 ⋅83939.

It is a cyclic number.

It is not a de Polignac number, because 31871041 - 2¹³ = 31862849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31870997 and 31871015.

It is not an unprimeable number, because it can be changed into a prime (31871011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370551 + ... + 370636.

It is an arithmetic number, because the mean of its divisors is an integer number (8153068).

Almost surely, 2^31871041 is an apocalyptic number.

It is an amenable number.

31871041 is a deficient number, since it is larger than the sum of its proper divisors (741231).

31871041 is an equidigital number, since it uses as much as digits as its factorization.

31871041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741230.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 31871041 is about 5645.4442694973. Note that the first 3 decimals coincide. The cubic root of 31871041 is about 317.0531577671.

Adding to 31871041 its reverse (14017813), we get a palindrome (45888854).

The spelling of 31871041 in words is "thirty-one million, eight hundred seventy-one thousand, forty-one".