340031221 has 4 divisors (see below), whose sum is σ = 349221292. Its totient is φ = 330841152.

The previous prime is 340031213. The next prime is 340031227. The reversal of 340031221 is 122130043.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135140625 + 204890596 = 11625^2 + 14314^2 .

It is a cyclic number.

It is not a de Polignac number, because 340031221 - 2³ = 340031213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340031195 and 340031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340031227) 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, 4594980 + ... + 4595053.

It is an arithmetic number, because the mean of its divisors is an integer number (87305323).

Almost surely, 2^340031221 is an apocalyptic number.

It is an amenable number.

340031221 is a deficient number, since it is larger than the sum of its proper divisors (9190071).

340031221 is an equidigital number, since it uses as much as digits as its factorization.

340031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190070.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 340031221 is about 18439.9354933796. The cubic root of 340031221 is about 697.9745675635.

Adding to 340031221 its reverse (122130043), we get a palindrome (462161264).

The spelling of 340031221 in words is "three hundred forty million, thirty-one thousand, two hundred twenty-one".