2015317 has 2 divisors, whose sum is σ = 2015318. Its totient is φ = 2015316.

The previous prime is 2015309. The next prime is 2015339. The reversal of 2015317 is 7135102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110916 + 904401 = 1054^2 + 951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015317 - 2³ = 2015309 is a prime.

It is a super-2 number, since 2×2015317² = 8123005220978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2015294 and 2015303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007658 + 1007659.

It is an arithmetic number, because the mean of its divisors is an integer number (1007659).

2^2015317 is an apocalyptic number.

It is an amenable number.

2015317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015317 is an equidigital number, since it uses as much as digits as its factorization.

2015317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 2015317 is about 1419.6186107543. The cubic root of 2015317 is about 126.3129242253.

It can be divided in two parts, 2015 and 317, that added together give a palindrome (2332).

The spelling of 2015317 in words is "two million, fifteen thousand, three hundred seventeen".