208228686007 has 4 divisors (see below), whose sum is σ = 208290680640. Its totient is φ = 208166691376.

The previous prime is 208228685971. The next prime is 208228686011. The reversal of 208228686007 is 700686822802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700686822802 = 2 ⋅350343411401.

It is a cyclic number.

It is not a de Polignac number, because 208228686007 - 2¹⁵ = 208228653239 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 (208228686077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30992278 + ... + 30998995.

It is an arithmetic number, because the mean of its divisors is an integer number (52072670160).

Almost surely, 2^208228686007 is an apocalyptic number.

208228686007 is a deficient number, since it is larger than the sum of its proper divisors (61994633).

208228686007 is an equidigital number, since it uses as much as digits as its factorization.

208228686007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61994632.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 208228686007 in words is "two hundred eight billion, two hundred twenty-eight million, six hundred eighty-six thousand, seven".