55100212 has 6 divisors (see below), whose sum is σ = 96425378. Its totient is φ = 27550104.

The previous prime is 55100191. The next prime is 55100219. The reversal of 55100212 is 21200155.

It can be written as a sum of positive squares in only one way, i.e., 46840336 + 8259876 = 6844^2 + 2874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6887523 + ... + 6887530.

Almost surely, 2^55100212 is an apocalyptic number.

It is an amenable number.

55100212 is a deficient number, since it is larger than the sum of its proper divisors (41325166).

55100212 is a wasteful number, since it uses less digits than its factorization.

55100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13775057 (or 13775055 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55100212 is about 7422.9517040056. The cubic root of 55100212 is about 380.5260765281.

Adding to 55100212 its reverse (21200155), we get a palindrome (76300367).

The spelling of 55100212 in words is "fifty-five million, one hundred thousand, two hundred twelve".