55605505 has 8 divisors (see below), whose sum is σ = 66771432. Its totient is φ = 44454528.

The previous prime is 55605503. The next prime is 55605523. The reversal of 55605505 is 50550655.

It can be written as a sum of positive squares in 4 ways, for example, as 370881 + 55234624 = 609^2 + 7432^2 .

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 55605505 - 2¹ = 55605503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55605503) 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, 7557 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (8346429).

Almost surely, 2^55605505 is an apocalyptic number.

It is an amenable number.

55605505 is a deficient number, since it is larger than the sum of its proper divisors (11165927).

55605505 is a wasteful number, since it uses less digits than its factorization.

55605505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 55605505 is about 7456.9098827866. The cubic root of 55605505 is about 381.6857356105.

The spelling of 55605505 in words is "fifty-five million, six hundred five thousand, five hundred five".