55505545 has 4 divisors (see below), whose sum is σ = 66606660. Its totient is φ = 44404432.

The previous prime is 55505539. The next prime is 55505557. The reversal of 55505545 is 54550555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38291344 + 17214201 = 6188^2 + 4149^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505545 - 2¹³ = 55497353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55505545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550550 + ... + 5550559.

It is an arithmetic number, because the mean of its divisors is an integer number (16651665).

Almost surely, 2^55505545 is an apocalyptic number.

It is an amenable number.

55505545 is a deficient number, since it is larger than the sum of its proper divisors (11101115).

55505545 is a wasteful number, since it uses less digits than its factorization.

55505545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101114.

The product of its (nonzero) digits is 62500, while the sum is 34.

The square root of 55505545 is about 7450.2043596132. The cubic root of 55505545 is about 381.4568842209.

The spelling of 55505545 in words is "fifty-five million, five hundred five thousand, five hundred forty-five".