31140065 has 8 divisors (see below), whose sum is σ = 40765248. Its totient is φ = 22647280.

The previous prime is 31140049. The next prime is 31140071. The reversal of 31140065 is 56004113.

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

It is not a de Polignac number, because 31140065 - 2⁴ = 31140049 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283037 + ... + 283146.

It is an arithmetic number, because the mean of its divisors is an integer number (5095656).

Almost surely, 2^31140065 is an apocalyptic number.

It is an amenable number.

31140065 is a deficient number, since it is larger than the sum of its proper divisors (9625183).

31140065 is a wasteful number, since it uses less digits than its factorization.

31140065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566199.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 31140065 is about 5580.3283953545. The cubic root of 31140065 is about 314.6104700457.

Adding to 31140065 its reverse (56004113), we get a palindrome (87144178).

The spelling of 31140065 in words is "thirty-one million, one hundred forty thousand, sixty-five".