55222809 has 8 divisors (see below), whose sum is σ = 74458080. Its totient is φ = 36401376.

The previous prime is 55222799. The next prime is 55222819. The reversal of 55222809 is 90822255.

It is an interprime number because it is at equal distance from previous prime (55222799) and next prime (55222819).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55222809 - 2⁸ = 55222553 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55222809.

It is not an unprimeable number, because it can be changed into a prime (55222819) 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 7 ways as a sum of consecutive naturals, for example, 103147 + ... + 103680.

It is an arithmetic number, because the mean of its divisors is an integer number (9307260).

Almost surely, 2^55222809 is an apocalyptic number.

It is an amenable number.

55222809 is a deficient number, since it is larger than the sum of its proper divisors (19235271).

55222809 is a wasteful number, since it uses less digits than its factorization.

55222809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206919.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 55222809 is about 7431.2050839685. The cubic root of 55222809 is about 380.8080887439.

The spelling of 55222809 in words is "fifty-five million, two hundred twenty-two thousand, eight hundred nine".