102447855 has 32 divisors (see below), whose sum is σ = 182603520. Its totient is φ = 54496800.

The previous prime is 102447847. The next prime is 102447871. The reversal of 102447855 is 558744201.

It is not a de Polignac number, because 102447855 - 2³ = 102447847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69880 + ... + 71330.

It is an arithmetic number, because the mean of its divisors is an integer number (5706360).

Almost surely, 2^102447855 is an apocalyptic number.

102447855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102447855 is a deficient number, since it is larger than the sum of its proper divisors (80155665).

102447855 is a wasteful number, since it uses less digits than its factorization.

102447855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 102447855 is about 10121.6527800552. The cubic root of 102447855 is about 467.9157063832.

The spelling of 102447855 in words is "one hundred two million, four hundred forty-seven thousand, eight hundred fifty-five".