208472219 has 4 divisors (see below), whose sum is σ = 209407296. Its totient is φ = 207537144.

The previous prime is 208472191. The next prime is 208472227. The reversal of 208472219 is 912274802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912274802 = 2 ⋅456137401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208472219 is a prime.

It is a super-2 number, since 2×208472219² = 86921332189567922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208472239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467204 + ... + 467649.

It is an arithmetic number, because the mean of its divisors is an integer number (52351824).

Almost surely, 2^208472219 is an apocalyptic number.

208472219 is a deficient number, since it is larger than the sum of its proper divisors (935077).

208472219 is an equidigital number, since it uses as much as digits as its factorization.

208472219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935076.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 208472219 is about 14438.5670687918. The cubic root of 208472219 is about 592.9472552185.

The spelling of 208472219 in words is "two hundred eight million, four hundred seventy-two thousand, two hundred nineteen".