211152172 has 96 divisors (see below), whose sum is σ = 498355200. Its totient is φ = 77333760.

The previous prime is 211152157. The next prime is 211152181. The reversal of 211152172 is 271251112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256153 + ... + 256975.

It is an arithmetic number, because the mean of its divisors is an integer number (5191200).

Almost surely, 2^211152172 is an apocalyptic number.

211152172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211152172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249177600).

211152172 is an abundant number, since it is smaller than the sum of its proper divisors (287203028).

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

211152172 is a wasteful number, since it uses less digits than its factorization.

211152172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 860 counting only the distinct ones).

The product of its digits is 280, while the sum is 22.

The square root of 211152172 is about 14531.0760785291. The cubic root of 211152172 is about 595.4772641312.

The spelling of 211152172 in words is "two hundred eleven million, one hundred fifty-two thousand, one hundred seventy-two".