212718194804 has 6 divisors (see below), whose sum is σ = 372256840914. Its totient is φ = 106359097400.

The previous prime is 212718194803. The next prime is 212718194831. The reversal of 212718194804 is 408491817212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 197686944400 + 15031250404 = 444620^2 + 122602^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212718194803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26589774347 + ... + 26589774354.

It is an arithmetic number, because the mean of its divisors is an integer number (62042806819).

Almost surely, 2^212718194804 is an apocalyptic number.

It is an amenable number.

212718194804 is a deficient number, since it is larger than the sum of its proper divisors (159538646110).

212718194804 is a wasteful number, since it uses less digits than its factorization.

212718194804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53179548705 (or 53179548703 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 212718194804 in words is "two hundred twelve billion, seven hundred eighteen million, one hundred ninety-four thousand, eight hundred four".