102186831285 has 128 divisors (see below), whose sum is σ = 228572467200. Its totient is φ = 42077180160.

The previous prime is 102186831281. The next prime is 102186831317. The reversal of 102186831285 is 582138681201.

It is not a de Polignac number, because 102186831285 - 2² = 102186831281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 102186831285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102186831281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1087962 + ... + 1178148.

It is an arithmetic number, because the mean of its divisors is an integer number (1785722400).

Almost surely, 2^102186831285 is an apocalyptic number.

102186831285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102186831285 is an abundant number, since it is smaller than the sum of its proper divisors (126385635915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102186831285 is a wasteful number, since it uses less digits than its factorization.

102186831285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90328 (or 90322 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 102186831285 in words is "one hundred two billion, one hundred eighty-six million, eight hundred thirty-one thousand, two hundred eighty-five".