4315221 has 16 divisors (see below), whose sum is σ = 6435520. Its totient is φ = 2857680.

The previous prime is 4315219. The next prime is 4315243. The reversal of 4315221 is 1225134.

It is not a de Polignac number, because 4315221 - 2¹ = 4315219 is a prime.

It is a super-2 number, since 2×4315221² = 37242264557682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

4315221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4315194 and 4315203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4315921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (402220).

Almost surely, 2^4315221 is an apocalyptic number.

It is an amenable number.

4315221 is a deficient number, since it is larger than the sum of its proper divisors (2120299).

4315221 is a wasteful number, since it uses less digits than its factorization.

4315221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 1067 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 4315221 is about 2077.3110022334. The cubic root of 4315221 is about 162.8049783465.

The spelling of 4315221 in words is "four million, three hundred fifteen thousand, two hundred twenty-one".