313440217 has 2 divisors, whose sum is σ = 313440218. Its totient is φ = 313440216.

The previous prime is 313440187. The next prime is 313440247. The reversal of 313440217 is 712044313.

It is a balanced prime because it is at equal distance from previous prime (313440187) and next prime (313440247).

It can be written as a sum of positive squares in only one way, i.e., 234212416 + 79227801 = 15304^2 + 8901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313440217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313440191 and 313440200.

It is not a weakly prime, because it can be changed into another prime (313440247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156720108 + 156720109.

It is an arithmetic number, because the mean of its divisors is an integer number (156720109).

Almost surely, 2^313440217 is an apocalyptic number.

It is an amenable number.

313440217 is a deficient number, since it is larger than the sum of its proper divisors (1).

313440217 is an equidigital number, since it uses as much as digits as its factorization.

313440217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 313440217 is about 17704.2429095401. The cubic root of 313440217 is about 679.2842938340.

The spelling of 313440217 in words is "three hundred thirteen million, four hundred forty thousand, two hundred seventeen".