55626209 has 8 divisors (see below), whose sum is σ = 56069760. Its totient is φ = 55184976.

The previous prime is 55626163. The next prime is 55626229. The reversal of 55626209 is 90262655.

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

It is a cyclic number.

It is not a de Polignac number, because 55626209 - 2⁸ = 55625953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55626229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119912 + ... + 120374.

It is an arithmetic number, because the mean of its divisors is an integer number (7008720).

Almost surely, 2^55626209 is an apocalyptic number.

It is an amenable number.

55626209 is a deficient number, since it is larger than the sum of its proper divisors (443551).

55626209 is a wasteful number, since it uses less digits than its factorization.

55626209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55626209 is about 7458.2979961919. The cubic root of 55626209 is about 381.7331016694.

The spelling of 55626209 in words is "fifty-five million, six hundred twenty-six thousand, two hundred nine".