31316293 has 4 divisors (see below), whose sum is σ = 32326528. Its totient is φ = 30306060.

The previous prime is 31316291. The next prime is 31316303. The reversal of 31316293 is 39261313.

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.

It is a cyclic number.

It is not a de Polignac number, because 31316293 - 2¹ = 31316291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31316291) 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, 505071 + ... + 505132.

It is an arithmetic number, because the mean of its divisors is an integer number (8081632).

Almost surely, 2^31316293 is an apocalyptic number.

It is an amenable number.

31316293 is a deficient number, since it is larger than the sum of its proper divisors (1010235).

31316293 is a wasteful number, since it uses less digits than its factorization.

31316293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010234.

The product of its digits is 2916, while the sum is 28.

The square root of 31316293 is about 5596.0962286222. The cubic root of 31316293 is about 315.2028356838.

The spelling of 31316293 in words is "thirty-one million, three hundred sixteen thousand, two hundred ninety-three".