100812195 has 96 divisors (see below), whose sum is σ = 208615680. Its totient is φ = 46189440.

The previous prime is 100812139. The next prime is 100812209. The reversal of 100812195 is 591218001.

It is not a de Polignac number, because 100812195 - 2⁷ = 100812067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 253737 + ... + 254133.

It is an arithmetic number, because the mean of its divisors is an integer number (2173080).

Almost surely, 2^100812195 is an apocalyptic number.

100812195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100812195 is an abundant number, since it is smaller than the sum of its proper divisors (107803485).

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

100812195 is a wasteful number, since it uses less digits than its factorization.

100812195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 100812195 is about 10040.5276255782. The cubic root of 100812195 is about 465.4121216284.

It can be divided in two parts, 1008 and 12195, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 100812195 in words is "one hundred million, eight hundred twelve thousand, one hundred ninety-five".