55030505 has 4 divisors (see below), whose sum is σ = 66036612. Its totient is φ = 44024400.

The previous prime is 55030501. The next prime is 55030523. The reversal of 55030505 is 50503055.

It is a happy number.

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 22174681 + 32855824 = 4709^2 + 5732^2 .

It is not a de Polignac number, because 55030505 - 2² = 55030501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55030501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5503046 + ... + 5503055.

It is an arithmetic number, because the mean of its divisors is an integer number (16509153).

Almost surely, 2^55030505 is an apocalyptic number.

It is an amenable number.

55030505 is a deficient number, since it is larger than the sum of its proper divisors (11006107).

55030505 is a wasteful number, since it uses less digits than its factorization.

55030505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11006106.

The product of its (nonzero) digits is 1875, while the sum is 23.

The square root of 55030505 is about 7418.2548486824. The cubic root of 55030505 is about 380.3655416057.

It can be divided in two parts, 5503050 and 5, that added together give a palindrome (5503055).

The spelling of 55030505 in words is "fifty-five million, thirty thousand, five hundred five".