31340031 has 16 divisors (see below), whose sum is σ = 43518048. Its totient is φ = 20044800.

The previous prime is 31340009. The next prime is 31340051. The reversal of 31340031 is 13004313.

It is not a de Polignac number, because 31340031 - 2⁶ = 31339967 is a prime.

It is a super-2 number, since 2×31340031² = 1964395086161922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5415 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (2719878).

Almost surely, 2^31340031 is an apocalyptic number.

31340031 is a deficient number, since it is larger than the sum of its proper divisors (12178017).

31340031 is a wasteful number, since it uses less digits than its factorization.

31340031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31340031 is about 5598.2167696509. The cubic root of 31340031 is about 315.2824576574.

Adding to 31340031 its reverse (13004313), we get a palindrome (44344344).

The spelling of 31340031 in words is "thirty-one million, three hundred forty thousand, thirty-one".