208215047 has 2 divisors, whose sum is σ = 208215048. Its totient is φ = 208215046.

The previous prime is 208215037. The next prime is 208215061. The reversal of 208215047 is 740512802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208215047 - 2¹⁰ = 208214023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208215017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104107523 + 104107524.

It is an arithmetic number, because the mean of its divisors is an integer number (104107524).

Almost surely, 2^208215047 is an apocalyptic number.

208215047 is a deficient number, since it is larger than the sum of its proper divisors (1).

208215047 is an equidigital number, since it uses as much as digits as its factorization.

208215047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 208215047 is about 14429.6585891697. The cubic root of 208215047 is about 592.7033343433.

Adding to 208215047 its reverse (740512802), we get a palindrome (948727849).

The spelling of 208215047 in words is "two hundred eight million, two hundred fifteen thousand, forty-seven".