2308221 has 6 divisors (see below), whose sum is σ = 3334110. Its totient is φ = 1538808.

The previous prime is 2308219. The next prime is 2308223. The reversal of 2308221 is 1228032.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2308219) and next prime (2308223).

It can be written as a sum of positive squares in only one way, i.e., 2295225 + 12996 = 1515^2 + 114^2 .

It is not a de Polignac number, because 2308221 - 2¹ = 2308219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2308194 and 2308203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2308223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128226 + ... + 128243.

It is an arithmetic number, because the mean of its divisors is an integer number (555685).

2^2308221 is an apocalyptic number.

It is an amenable number.

2308221 is a deficient number, since it is larger than the sum of its proper divisors (1025889).

2308221 is a wasteful number, since it uses less digits than its factorization.

2308221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256475 (or 256472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2308221 is about 1519.2830546017. The cubic root of 2308221 is about 132.1576972029.

The spelling of 2308221 in words is "two million, three hundred eight thousand, two hundred twenty-one".