55561204 has 6 divisors (see below), whose sum is σ = 97232114. Its totient is φ = 27780600.

The previous prime is 55561193. The next prime is 55561213. The reversal of 55561204 is 40216555.

It can be written as a sum of positive squares in only one way, i.e., 55532304 + 28900 = 7452^2 + 170^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6945147 + ... + 6945154.

Almost surely, 2^55561204 is an apocalyptic number.

It is an amenable number.

55561204 is a deficient number, since it is larger than the sum of its proper divisors (41670910).

55561204 is a wasteful number, since it uses less digits than its factorization.

55561204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890305 (or 13890303 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55561204 is about 7453.9388245410. The cubic root of 55561204 is about 381.5843454558.

Adding to 55561204 its reverse (40216555), we get a palindrome (95777759).

The spelling of 55561204 in words is "fifty-five million, five hundred sixty-one thousand, two hundred four".