55222210561 has 12 divisors (see below), whose sum is σ = 66310279680. Its totient is φ = 45806440680.

The previous prime is 55222210441. The next prime is 55222210619. The reversal of 55222210561 is 16501222255.

It is a happy number.

It is not a de Polignac number, because 55222210561 - 2¹⁵ = 55222177793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (55222210361) 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 11 ways as a sum of consecutive naturals, for example, 18175641 + ... + 18178678.

It is an arithmetic number, because the mean of its divisors is an integer number (5525856640).

Almost surely, 2^55222210561 is an apocalyptic number.

It is an amenable number.

55222210561 is a deficient number, since it is larger than the sum of its proper divisors (11088069119).

55222210561 is a wasteful number, since it uses less digits than its factorization.

55222210561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36354364 (or 36354357 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 55222210561 in words is "fifty-five billion, two hundred twenty-two million, two hundred ten thousand, five hundred sixty-one".