55507007 has 4 divisors (see below), whose sum is σ = 55532040. Its totient is φ = 55481976.

The previous prime is 55506991. The next prime is 55507013. The reversal of 55507007 is 70070555.

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

It is a cyclic number.

It is not a de Polignac number, because 55507007 - 2⁴ = 55506991 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 (55507087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8828 + ... + 13745.

It is an arithmetic number, because the mean of its divisors is an integer number (13883010).

Almost surely, 2^55507007 is an apocalyptic number.

55507007 is a deficient number, since it is larger than the sum of its proper divisors (25033).

55507007 is a wasteful number, since it uses less digits than its factorization.

55507007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25032.

The product of its (nonzero) digits is 6125, while the sum is 29.

The square root of 55507007 is about 7450.3024770810. The cubic root of 55507007 is about 381.4602333461.

The spelling of 55507007 in words is "fifty-five million, five hundred seven thousand, seven".