209264055 has 144 divisors (see below), whose sum is σ = 463593312. Its totient is φ = 79833600.

The previous prime is 209264053. The next prime is 209264059. The reversal of 209264055 is 550462902.

209264055 = 1138² + 1139² + ... + 1280².

It is not a de Polignac number, because 209264055 - 2¹ = 209264053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209264053) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 1156065 + ... + 1156245.

It is an arithmetic number, because the mean of its divisors is an integer number (3219398).

Almost surely, 2^209264055 is an apocalyptic number.

209264055 is an abundant number, since it is smaller than the sum of its proper divisors (254329257).

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

209264055 is a wasteful number, since it uses less digits than its factorization.

209264055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 209264055 is about 14465.9619452009. The cubic root of 209264055 is about 593.6970334284.

The spelling of 209264055 in words is "two hundred nine million, two hundred sixty-four thousand, fifty-five".