55500007 has 4 divisors (see below), whose sum is σ = 58421080. Its totient is φ = 52578936.

The previous prime is 55499993. The next prime is 55500031. The reversal of 55500007 is 70000555.

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 55500007 - 2⁷ = 55499879 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 (55500047) 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, 1460508 + ... + 1460545.

It is an arithmetic number, because the mean of its divisors is an integer number (14605270).

Almost surely, 2^55500007 is an apocalyptic number.

55500007 is a deficient number, since it is larger than the sum of its proper divisors (2921073).

55500007 is a wasteful number, since it uses less digits than its factorization.

55500007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921072.

The product of its (nonzero) digits is 875, while the sum is 22.

The square root of 55500007 is about 7449.8326826849. The cubic root of 55500007 is about 381.4441973293. Note that the first 3 decimals are identical.

The spelling of 55500007 in words is "fifty-five million, five hundred thousand, seven".