108212172 has 12 divisors (see below), whose sum is σ = 252495096. Its totient is φ = 36070720.

The previous prime is 108212141. The next prime is 108212173. The reversal of 108212172 is 271212801.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (108212173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4508829 + ... + 4508852.

It is an arithmetic number, because the mean of its divisors is an integer number (21041258).

Almost surely, 2^108212172 is an apocalyptic number.

108212172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

108212172 is an abundant number, since it is smaller than the sum of its proper divisors (144282924).

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

108212172 is a wasteful number, since it uses less digits than its factorization.

108212172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017688 (or 9017686 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 108212172 is about 10402.5079668318. The cubic root of 108212172 is about 476.5319653506.

Adding to 108212172 its reverse (271212801), we get a palindrome (379424973).

The spelling of 108212172 in words is "one hundred eight million, two hundred twelve thousand, one hundred seventy-two".