208106013 has 8 divisors (see below), whose sum is σ = 277957888. Its totient is φ = 138495744.

The previous prime is 208105981. The next prime is 208106023. The reversal of 208106013 is 310601802.

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

It is not a de Polignac number, because 208106013 - 2⁵ = 208105981 is a prime.

It is a super-2 number, since 2×208106013² = 86616225293512338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208106023) 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, 58381 + ... + 61842.

It is an arithmetic number, because the mean of its divisors is an integer number (34744736).

Almost surely, 2^208106013 is an apocalyptic number.

It is an amenable number.

208106013 is a deficient number, since it is larger than the sum of its proper divisors (69851875).

208106013 is a wasteful number, since it uses less digits than its factorization.

208106013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120803.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 208106013 is about 14425.8799731593. The cubic root of 208106013 is about 592.5998578333.

Adding to 208106013 its reverse (310601802), we get a palindrome (518707815).

The spelling of 208106013 in words is "two hundred eight million, one hundred six thousand, thirteen".