55000505 has 16 divisors (see below), whose sum is σ = 76495104. Its totient is φ = 37181760.

The previous prime is 55000499. The next prime is 55000507. The reversal of 55000505 is 50500055.

It is a happy number.

It is not a de Polignac number, because 55000505 - 2²⁰ = 53951929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55000507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8582 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (4780944).

Almost surely, 2^55000505 is an apocalyptic number.

It is an amenable number.

55000505 is a deficient number, since it is larger than the sum of its proper divisors (21494599).

55000505 is a wasteful number, since it uses less digits than its factorization.

55000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22216.

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 55000505 is about 7416.2325341106. The cubic root of 55000505 is about 380.2964100065.

It can be divided in two parts, 5500050 and 5, that added together give a palindrome (5500055).

The spelling of 55000505 in words is "fifty-five million, five hundred five", and thus it is an aban number.