55222761 has 32 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 32480000.

The previous prime is 55222733. The next prime is 55222781. The reversal of 55222761 is 16722255.

55222761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55222761 - 2⁷ = 55222633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55222781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219886 + ... + 220136.

It is an arithmetic number, because the mean of its divisors is an integer number (2585520).

Almost surely, 2^55222761 is an apocalyptic number.

It is an amenable number.

55222761 is a deficient number, since it is larger than the sum of its proper divisors (27513879).

55222761 is a wasteful number, since it uses less digits than its factorization.

55222761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its digits is 8400, while the sum is 30.

The square root of 55222761 is about 7431.2018543436. The cubic root of 55222761 is about 380.8079784103.

The spelling of 55222761 in words is "fifty-five million, two hundred twenty-two thousand, seven hundred sixty-one".