2315217 has 4 divisors (see below), whose sum is σ = 3086960. Its totient is φ = 1543476.

The previous prime is 2315177. The next prime is 2315227. The reversal of 2315217 is 7125132.

2315217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2315217 - 2¹⁴ = 2298833 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

2315217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2315193 and 2315202.

It is not an unprimeable number, because it can be changed into a prime (2315227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385867 + ... + 385872.

It is an arithmetic number, because the mean of its divisors is an integer number (771740).

2^2315217 is an apocalyptic number.

It is an amenable number.

2315217 is a deficient number, since it is larger than the sum of its proper divisors (771743).

2315217 is an equidigital number, since it uses as much as digits as its factorization.

2315217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771742.

The product of its digits is 420, while the sum is 21.

The square root of 2315217 is about 1521.5837144239. The cubic root of 2315217 is about 132.2910817039.

The spelling of 2315217 in words is "two million, three hundred fifteen thousand, two hundred seventeen".