55005607 has 4 divisors (see below), whose sum is σ = 55034896. Its totient is φ = 54976320.

The previous prime is 55005583. The next prime is 55005623. The reversal of 55005607 is 70650055.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55005607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005667) 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, 11619 + ... + 15652.

It is an arithmetic number, because the mean of its divisors is an integer number (13758724).

Almost surely, 2^55005607 is an apocalyptic number.

55005607 is a deficient number, since it is larger than the sum of its proper divisors (29289).

55005607 is a wasteful number, since it uses less digits than its factorization.

55005607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29288.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 55005607 is about 7416.5765013246. The cubic root of 55005607 is about 380.3081687609.

The spelling of 55005607 in words is "fifty-five million, five thousand, six hundred seven".