313020217 has 2 divisors, whose sum is σ = 313020218. Its totient is φ = 313020216.

The previous prime is 313020187. The next prime is 313020241. The reversal of 313020217 is 712020313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245517561 + 67502656 = 15669^2 + 8216^2 .

It is a cyclic number.

It is not a de Polignac number, because 313020217 - 2¹¹ = 313018169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313020194 and 313020203.

It is not a weakly prime, because it can be changed into another prime (313020017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156510108 + 156510109.

It is an arithmetic number, because the mean of its divisors is an integer number (156510109).

Almost surely, 2^313020217 is an apocalyptic number.

It is an amenable number.

313020217 is a deficient number, since it is larger than the sum of its proper divisors (1).

313020217 is an equidigital number, since it uses as much as digits as its factorization.

313020217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 313020217 is about 17692.3773699297. The cubic root of 313020217 is about 678.9807517085.

It can be divided in two parts, 313020 and 217, that multiplied together give a triangular number (67925340 = T₁₁₆₅₅).

The spelling of 313020217 in words is "three hundred thirteen million, twenty thousand, two hundred seventeen".