102808155 has 8 divisors (see below), whose sum is σ = 164493072. Its totient is φ = 54831008.

The previous prime is 102808117. The next prime is 102808157. The reversal of 102808155 is 551808201.

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

It is a cyclic number.

It is not a de Polignac number, because 102808155 - 2⁸ = 102807899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102808157) 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 7 ways as a sum of consecutive naturals, for example, 3426924 + ... + 3426953.

It is an arithmetic number, because the mean of its divisors is an integer number (20561634).

Almost surely, 2^102808155 is an apocalyptic number.

102808155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102808155 is a deficient number, since it is larger than the sum of its proper divisors (61684917).

102808155 is an equidigital number, since it uses as much as digits as its factorization.

102808155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853885.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 102808155 is about 10139.4356351821. The cubic root of 102808155 is about 468.4636038983.

The spelling of 102808155 in words is "one hundred two million, eight hundred eight thousand, one hundred fifty-five".