212172114 has 64 divisors (see below), whose sum is σ = 534408192. Its totient is φ = 54552000.

The previous prime is 212172113. The next prime is 212172137. The reversal of 212172114 is 411271212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212172113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44389 + ... + 48935.

It is an arithmetic number, because the mean of its divisors is an integer number (8350128).

Almost surely, 2^212172114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212172114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267204096).

212172114 is an abundant number, since it is smaller than the sum of its proper divisors (322236078).

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

212172114 is a wasteful number, since it uses less digits than its factorization.

212172114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671.

The product of its digits is 224, while the sum is 21.

The square root of 212172114 is about 14566.1289984676. The cubic root of 212172114 is about 596.4345152783.

The spelling of 212172114 in words is "two hundred twelve million, one hundred seventy-two thousand, one hundred fourteen".