212743534185 has 224 divisors, whose sum is σ = 495902319360. Its totient is φ = 85045676544.

The previous prime is 212743534151. The next prime is 212743534219. The reversal of 212743534185 is 581435347212.

212743534185 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 435 + 34 + 185 = 666.

It is an interprime number because it is at equal distance from previous prime (212743534151) and next prime (212743534219).

It is not a de Polignac number, because 212743534185 - 2⁶ = 212743534121 is a prime.

It is a super-2 number, since 2×212743534185² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 212743534185.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 6285327 + ... + 6319083.

It is an arithmetic number, because the mean of its divisors is an integer number (2213849640).

Almost surely, 2^212743534185 is an apocalyptic number.

It is an amenable number.

212743534185 is an abundant number, since it is smaller than the sum of its proper divisors (283158785175).

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

212743534185 is a wasteful number, since it uses less digits than its factorization.

212743534185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33819 (or 33804 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 212743534185 in words is "two hundred twelve billion, seven hundred forty-three million, five hundred thirty-four thousand, one hundred eighty-five".