2315221 has 4 divisors (see below), whose sum is σ = 2318272. Its totient is φ = 2312172.

The previous prime is 2315177. The next prime is 2315227. The reversal of 2315221 is 1225132.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2315221 - 2⁹ = 2314709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2315195 and 2315204.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (579568).

2^2315221 is an apocalyptic number.

It is an amenable number.

2315221 is a deficient number, since it is larger than the sum of its proper divisors (3051).

2315221 is a wasteful number, since it uses less digits than its factorization.

2315221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050.

The product of its digits is 120, while the sum is 16.

The square root of 2315221 is about 1521.5850288433. The cubic root of 2315221 is about 132.2911578903.

The spelling of 2315221 in words is "two million, three hundred fifteen thousand, two hundred twenty-one".