318485231 has 2 divisors, whose sum is σ = 318485232. Its totient is φ = 318485230.

The previous prime is 318485183. The next prime is 318485273. The reversal of 318485231 is 132584813.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318485231 is a prime.

It is a super-2 number, since 2×318485231² = 202865684730246722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 318485191 and 318485200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318485291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159242615 + 159242616.

It is an arithmetic number, because the mean of its divisors is an integer number (159242616).

Almost surely, 2^318485231 is an apocalyptic number.

318485231 is a deficient number, since it is larger than the sum of its proper divisors (1).

318485231 is an equidigital number, since it uses as much as digits as its factorization.

318485231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 318485231 is about 17846.1545157493. The cubic root of 318485231 is about 682.9094135030.

The spelling of 318485231 in words is "three hundred eighteen million, four hundred eighty-five thousand, two hundred thirty-one".