212717840452 has 12 divisors (see below), whose sum is σ = 400891314796. Its totient is φ = 98177464800.

The previous prime is 212717840399. The next prime is 212717840483. The reversal of 212717840452 is 254048717212.

It can be written as a sum of positive squares in 2 ways, for example, as 133112603716 + 79605236736 = 364846^2 + 282144^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 212717840399 and 212717840408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045363799 + ... + 2045363902.

Almost surely, 2^212717840452 is an apocalyptic number.

It is an amenable number.

212717840452 is a deficient number, since it is larger than the sum of its proper divisors (188173474344).

212717840452 is a wasteful number, since it uses less digits than its factorization.

212717840452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090727718 (or 4090727716 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The spelling of 212717840452 in words is "two hundred twelve billion, seven hundred seventeen million, eight hundred forty thousand, four hundred fifty-two".