340520221 has 8 divisors (see below), whose sum is σ = 358041024. Its totient is φ = 323225760.

The previous prime is 340520209. The next prime is 340520231. The reversal of 340520221 is 122025043.

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

It is a cyclic number.

It is not a de Polignac number, because 340520221 - 2¹⁹ = 339995933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340520231) 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, 53496 + ... + 59521.

It is an arithmetic number, because the mean of its divisors is an integer number (44755128).

Almost surely, 2^340520221 is an apocalyptic number.

It is an amenable number.

340520221 is a deficient number, since it is larger than the sum of its proper divisors (17520803).

340520221 is a wasteful number, since it uses less digits than its factorization.

340520221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113171.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 340520221 is about 18453.1899952285. The cubic root of 340520221 is about 698.3089937968.

Adding to 340520221 its reverse (122025043), we get a palindrome (462545264).

The spelling of 340520221 in words is "three hundred forty million, five hundred twenty thousand, two hundred twenty-one".