102783155 has 8 divisors (see below), whose sum is σ = 124561584. Its totient is φ = 81412000.

The previous prime is 102783137. The next prime is 102783157. The reversal of 102783155 is 551387201.

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

It is not a de Polignac number, because 102783155 - 2⁶ = 102783091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102783157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101261 + ... + 102270.

It is an arithmetic number, because the mean of its divisors is an integer number (15570198).

Almost surely, 2^102783155 is an apocalyptic number.

102783155 is a deficient number, since it is larger than the sum of its proper divisors (21778429).

102783155 is a wasteful number, since it uses less digits than its factorization.

102783155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203637.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 102783155 is about 10138.2027499947. The cubic root of 102783155 is about 468.4256285076.

The spelling of 102783155 in words is "one hundred two million, seven hundred eighty-three thousand, one hundred fifty-five".