55515505 has 8 divisors (see below), whose sum is σ = 66684672. Its totient is φ = 44368368.

The previous prime is 55515497. The next prime is 55515529. The reversal of 55515505 is 50551555.

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 55515505 - 2³ = 55515497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (8335584).

Almost surely, 2^55515505 is an apocalyptic number.

It is an amenable number.

55515505 is a deficient number, since it is larger than the sum of its proper divisors (11169167).

55515505 is a wasteful number, since it uses less digits than its factorization.

55515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11015.

The product of its (nonzero) digits is 15625, while the sum is 31.

The square root of 55515505 is about 7450.8727676696. The cubic root of 55515505 is about 381.4796992588.

It can be divided in two parts, 5551550 and 5, that added together give a palindrome (5551555).

The spelling of 55515505 in words is "fifty-five million, five hundred fifteen thousand, five hundred five".