55597205 has 8 divisors (see below), whose sum is σ = 69017400. Its totient is φ = 42943936.

The previous prime is 55597177. The next prime is 55597207. The reversal of 55597205 is 50279555.

It can be written as a sum of positive squares in 4 ways, for example, as 12327121 + 43270084 = 3511^2 + 6578^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55597205 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55597207) 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, 191570 + ... + 191859.

It is an arithmetic number, because the mean of its divisors is an integer number (8627175).

Almost surely, 2^55597205 is an apocalyptic number.

It is an amenable number.

55597205 is a deficient number, since it is larger than the sum of its proper divisors (13420195).

55597205 is a wasteful number, since it uses less digits than its factorization.

55597205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383463.

The product of its (nonzero) digits is 78750, while the sum is 38.

The square root of 55597205 is about 7456.3533312203. The cubic root of 55597205 is about 381.6667437904. Note that the first 3 decimals are identical.

The spelling of 55597205 in words is "fifty-five million, five hundred ninety-seven thousand, two hundred five".