55205506 has 4 divisors (see below), whose sum is σ = 82808262. Its totient is φ = 27602752.

The previous prime is 55205483. The next prime is 55205509. The reversal of 55205506 is 60550255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54154881 + 1050625 = 7359^2 + 1025^2 .

It is not an unprimeable number, because it can be changed into a prime (55205509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13801375 + ... + 13801378.

Almost surely, 2^55205506 is an apocalyptic number.

55205506 is a deficient number, since it is larger than the sum of its proper divisors (27602756).

55205506 is a wasteful number, since it uses less digits than its factorization.

55205506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27602755.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55205506 is about 7430.0407805072. The cubic root of 55205506 is about 380.7683116374.

It can be divided in two parts, 5520 and 5506, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 55205506 in words is "fifty-five million, two hundred five thousand, five hundred six".