340345221 has 8 divisors (see below), whose sum is σ = 454531584. Its totient is φ = 226527840.

The previous prime is 340345183. The next prime is 340345289. The reversal of 340345221 is 122543043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 340345221 - 2¹⁴ = 340328837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340345191 and 340345200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340347221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90085 + ... + 93786.

It is an arithmetic number, because the mean of its divisors is an integer number (56816448).

Almost surely, 2^340345221 is an apocalyptic number.

It is an amenable number.

340345221 is a deficient number, since it is larger than the sum of its proper divisors (114186363).

340345221 is a wasteful number, since it uses less digits than its factorization.

340345221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184491.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 340345221 is about 18448.4476582720. The cubic root of 340345221 is about 698.1893484163.

Adding to 340345221 its reverse (122543043), we get a palindrome (462888264).

The spelling of 340345221 in words is "three hundred forty million, three hundred forty-five thousand, two hundred twenty-one".