102206015 has 4 divisors (see below), whose sum is σ = 122647224. Its totient is φ = 81764808.

The previous prime is 102206009. The next prime is 102206033. The reversal of 102206015 is 510602201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102206015 - 2²⁰ = 101157439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102205984 and 102206002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220597 + ... + 10220606.

It is an arithmetic number, because the mean of its divisors is an integer number (30661806).

Almost surely, 2^102206015 is an apocalyptic number.

102206015 is a deficient number, since it is larger than the sum of its proper divisors (20441209).

102206015 is an equidigital number, since it uses as much as digits as its factorization.

102206015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20441208.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102206015 is about 10109.6990558572. The cubic root of 102206015 is about 467.5472265863.

Adding to 102206015 its reverse (510602201), we get a palindrome (612808216).

The spelling of 102206015 in words is "one hundred two million, two hundred six thousand, fifteen".