212173124 has 24 divisors (see below), whose sum is σ = 397049688. Its totient is φ = 98854400.

The previous prime is 212173081. The next prime is 212173139. The reversal of 212173124 is 421371212.

It can be written as a sum of positive squares in 4 ways, for example, as 103388224 + 108784900 = 10168^2 + 10430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212173124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8579 + ... + 22314.

It is an arithmetic number, because the mean of its divisors is an integer number (16543737).

Almost surely, 2^212173124 is an apocalyptic number.

It is an amenable number.

212173124 is a deficient number, since it is larger than the sum of its proper divisors (184876564).

212173124 is a wasteful number, since it uses less digits than its factorization.

212173124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31015 (or 31013 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 212173124 is about 14566.1636678983. The cubic root of 212173124 is about 596.4354616764.

The spelling of 212173124 in words is "two hundred twelve million, one hundred seventy-three thousand, one hundred twenty-four".