102155500 has 24 divisors (see below), whose sum is σ = 223108704.
Its totient is φ = 40862000.
The previous prime is 102155497. The next prime is 102155507. The reversal of 102155500 is 5551201.
It is not an unprimeable number, because it can be changed into a prime (102155507) 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, 101656 + ... + 102655.
It is an arithmetic number, because the mean of its divisors is an integer number (9296196).
Almost surely, 2102155500 is an apocalyptic number.
102155500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
102155500 is an abundant number, since it is smaller than the sum of its proper divisors (120953204).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
102155500 is a wasteful number, since it uses less digits than its factorization.
102155500 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 204330 (or 204318 counting only the distinct ones).
The product of its (nonzero) digits is 250, while the sum is 19.
The square root of 102155500 is about 10107.2004036726.
The cubic root of 102155500 is about 467.4701859794.
The spelling of 102155500 in words is "one hundred two million, one hundred fifty-five thousand, five hundred".