212807180385 has 96 divisors (see below), whose sum is σ = 398600442240. Its totient is φ = 104681880576.

The previous prime is 212807180317. The next prime is 212807180491. The reversal of 212807180385 is 583081708212.

212807180385 is a `hidden beast` number, since 2 + 12 + 80 + 7 + 180 + 385 = 666.

It is not a de Polignac number, because 212807180385 - 2²¹ = 212805083233 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212807180385.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11498199 + ... + 11516691.

It is an arithmetic number, because the mean of its divisors is an integer number (4152087940).

Almost surely, 2^212807180385 is an apocalyptic number.

It is an amenable number.

212807180385 is a deficient number, since it is larger than the sum of its proper divisors (185793261855).

212807180385 is a wasteful number, since it uses less digits than its factorization.

212807180385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18879 (or 18876 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

Adding to 212807180385 its reverse (583081708212), we get a palindrome (795888888597).

The spelling of 212807180385 in words is "two hundred twelve billion, eight hundred seven million, one hundred eighty thousand, three hundred eighty-five".