843212720052 has 18 divisors (see below), whose sum is σ = 2131454375778. Its totient is φ = 281070906672.

The previous prime is 843212720033. The next prime is 843212720069. The reversal of 843212720052 is 250027212348.

843212720052 is a `hidden beast` number, since 8 + 432 + 12 + 7 + 200 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 553482433296 + 289730286756 = 743964^2 + 538266^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×843212720052² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23422575557 = 843212720052 / (8 + 4 + 3 + 2 + 1 + 2 + 7 + 2 + 0 + 0 + 5 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 843212719989 and 843212720016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11711287743 + ... + 11711287814.

Almost surely, 2^843212720052 is an apocalyptic number.

It is an amenable number.

843212720052 is an abundant number, since it is smaller than the sum of its proper divisors (1288241655726).

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

843212720052 is a wasteful number, since it uses less digits than its factorization.

843212720052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23422575567 (or 23422575562 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 843212720052 in words is "eight hundred forty-three billion, two hundred twelve million, seven hundred twenty thousand, fifty-two".