55218420196 has 27 divisors (see below), whose sum is σ = 97205570203. Its totient is φ = 27446364800.

The previous prime is 55218420167. The next prime is 55218420197. The reversal of 55218420196 is 69102481255.

The square root of 55218420196 is 234986.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 49279560100 + 5938860096 = 221990^2 + 77064^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55218420197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 137701596 + ... + 137701996.

Almost surely, 2^55218420196 is an apocalyptic number.

55218420196 is the 234986-th square number.

It is an amenable number.

55218420196 is a deficient number, since it is larger than the sum of its proper divisors (41987150007).

55218420196 is an frugal number, since it uses more digits than its factorization.

55218420196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 55218420196 in words is "fifty-five billion, two hundred eighteen million, four hundred twenty thousand, one hundred ninety-six".