55003212 has 180 divisors, whose sum is σ = 167624688. Its totient is φ = 15681600.

The previous prime is 55003199. The next prime is 55003213. The reversal of 55003212 is 21230055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (55003213) 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 in 59 ways as a sum of consecutive naturals, for example, 901662 + ... + 901722.

Almost surely, 2^55003212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55003212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83812344).

55003212 is an abundant number, since it is smaller than the sum of its proper divisors (112621476).

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

55003212 is a wasteful number, since it uses less digits than its factorization.

55003212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 55003212 is about 7416.4150369299. The cubic root of 55003212 is about 380.3026490128.

Adding to 55003212 its reverse (21230055), we get a palindrome (76233267).

The spelling of 55003212 in words is "fifty-five million, three thousand, two hundred twelve".