55212017226240 has 1920 divisors, whose sum is σ = 214510558445568. Its totient is φ = 12071815741440.

The previous prime is 55212017226239. The next prime is 55212017226307. The reversal of 55212017226240 is 4262271021255.

It is a tau number, because it is divible by the number of its divisors (1920).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 179843704167 + ... + 179843704473.

Almost surely, 2^{55212017226240} 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 55212017226240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107255279222784).

55212017226240 is an abundant number, since it is smaller than the sum of its proper divisors (159298541219328).

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

55212017226240 is a wasteful number, since it uses less digits than its factorization.

55212017226240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

Adding to 55212017226240 its reverse (4262271021255), we get a palindrome (59474288247495).

The spelling of 55212017226240 in words is "fifty-five trillion, two hundred twelve billion, seventeen million, two hundred twenty-six thousand, two hundred forty".