340217215 has 8 divisors (see below), whose sum is σ = 439665408. Its totient is φ = 251237280.

The previous prime is 340217203. The next prime is 340217233. The reversal of 340217215 is 512712043.

It is a happy number.

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

It is not a de Polignac number, because 340217215 - 2¹⁵ = 340184447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340217215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2616991 + ... + 2617120.

It is an arithmetic number, because the mean of its divisors is an integer number (54958176).

Almost surely, 2^340217215 is an apocalyptic number.

340217215 is a deficient number, since it is larger than the sum of its proper divisors (99448193).

340217215 is a wasteful number, since it uses less digits than its factorization.

340217215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234129.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 340217215 is about 18444.9780428170. The cubic root of 340217215 is about 698.1018062903.

Adding to 340217215 its reverse (512712043), we get a palindrome (852929258).

The spelling of 340217215 in words is "three hundred forty million, two hundred seventeen thousand, two hundred fifteen".