340645221 has 24 divisors (see below), whose sum is σ = 563369664. Its totient is φ = 194296320.

The previous prime is 340645213. The next prime is 340645231. The reversal of 340645221 is 122546043.

It is not a de Polignac number, because 340645221 - 2³ = 340645213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340645231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31666 + ... + 41036.

It is an arithmetic number, because the mean of its divisors is an integer number (23473736).

Almost surely, 2^340645221 is an apocalyptic number.

It is an amenable number.

340645221 is a deficient number, since it is larger than the sum of its proper divisors (222724443).

340645221 is a wasteful number, since it uses less digits than its factorization.

340645221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9961 (or 9958 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 340645221 is about 18456.5766327345. The cubic root of 340645221 is about 698.3944296879.

The spelling of 340645221 in words is "three hundred forty million, six hundred forty-five thousand, two hundred twenty-one".