31317005 has 8 divisors (see below), whose sum is σ = 37750272. Its totient is φ = 24940368.

The previous prime is 31316983. The next prime is 31317049. The reversal of 31317005 is 50071313.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31317005 - 2⁸ = 31316749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12929 + ... + 15158.

It is an arithmetic number, because the mean of its divisors is an integer number (4718784).

Almost surely, 2^31317005 is an apocalyptic number.

It is an amenable number.

31317005 is a deficient number, since it is larger than the sum of its proper divisors (6433267).

31317005 is a wasteful number, since it uses less digits than its factorization.

31317005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28315.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 31317005 is about 5596.1598440359. The cubic root of 31317005 is about 315.2052244586.

Adding to 31317005 its reverse (50071313), we get a palindrome (81388318).

The spelling of 31317005 in words is "thirty-one million, three hundred seventeen thousand, five".