212170700 has 72 divisors (see below), whose sum is σ = 531570144. Its totient is φ = 72000000.

The previous prime is 212170687. The next prime is 212170733. The reversal of 212170700 is 7071212.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69200 + ... + 72200.

Almost surely, 2^212170700 is an apocalyptic number.

212170700 is a gapful number since it is divisible by the number (20) 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 212170700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265785072).

212170700 is an abundant number, since it is smaller than the sum of its proper divisors (319399444).

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

212170700 is a wasteful number, since it uses less digits than its factorization.

212170700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 212170700 is about 14566.0804611261. The cubic root of 212170700 is about 596.4331903158.

The spelling of 212170700 in words is "two hundred twelve million, one hundred seventy thousand, seven hundred".