55511041212 has 144 divisors (see below), whose sum is σ = 161737430400. Its totient is φ = 15876362880.

The previous prime is 55511041211. The next prime is 55511041237. The reversal of 55511041212 is 21214011555.

It is a happy number.

55511041212 is a `hidden beast` number, since 5 + 551 + 104 + 1 + 2 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511041211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2010243 + ... + 2037669.

It is an arithmetic number, because the mean of its divisors is an integer number (1123176600).

Almost surely, 2^55511041212 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 55511041212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80868715200).

55511041212 is an abundant number, since it is smaller than the sum of its proper divisors (106226389188).

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

55511041212 is a wasteful number, since it uses less digits than its factorization.

55511041212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27736 (or 27731 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 55511041212 its reverse (21214011555), we get a palindrome (76725052767).

The spelling of 55511041212 in words is "fifty-five billion, five hundred eleven million, forty-one thousand, two hundred twelve".