55151211222 has 24 divisors (see below), whose sum is σ = 122036724576. Its totient is φ = 17992593456.

The previous prime is 55151211221. The next prime is 55151211229. The reversal of 55151211222 is 22211215155.

55151211222 is a `hidden beast` number, since 5 + 515 + 1 + 21 + 122 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55151211221) 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 11 ways as a sum of consecutive naturals, for example, 32594433 + ... + 32596124.

It is an arithmetic number, because the mean of its divisors is an integer number (5084863524).

Almost surely, 2^55151211222 is an apocalyptic number.

55151211222 is an abundant number, since it is smaller than the sum of its proper divisors (66885513354).

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

55151211222 is a wasteful number, since it uses less digits than its factorization.

55151211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65190612 (or 65190609 counting only the distinct ones).

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

Adding to 55151211222 its reverse (22211215155), we get a palindrome (77362426377).

The spelling of 55151211222 in words is "fifty-five billion, one hundred fifty-one million, two hundred eleven thousand, two hundred twenty-two".