316231391 has 8 divisors (see below), whose sum is σ = 365982720. Its totient is φ = 267623928.

The previous prime is 316231379. The next prime is 316231429. The reversal of 316231391 is 193132613.

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 316231391 - 2¹⁰ = 316230367 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 (316231351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285371 + ... + 286476.

It is an arithmetic number, because the mean of its divisors is an integer number (45747840).

Almost surely, 2^316231391 is an apocalyptic number.

316231391 is a deficient number, since it is larger than the sum of its proper divisors (49751329).

316231391 is an equidigital number, since it uses as much as digits as its factorization.

316231391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571933.

The product of its digits is 2916, while the sum is 29.

The square root of 316231391 is about 17782.8960239889. The cubic root of 316231391 is about 681.2946723112.

It can be divided in two parts, 316231 and 391, that multiplied together give a palindrome (123646321).

The spelling of 316231391 in words is "three hundred sixteen million, two hundred thirty-one thousand, three hundred ninety-one".