55555005 has 32 divisors (see below), whose sum is σ = 101191680. Its totient is φ = 25762880.

The previous prime is 55555001. The next prime is 55555009. The reversal of 55555005 is 50055555.

It is an interprime number because it is at equal distance from previous prime (55555001) and next prime (55555009).

It is not a de Polignac number, because 55555005 - 2² = 55555001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3525 + ... + 11114.

It is an arithmetic number, because the mean of its divisors is an integer number (3162240).

Almost surely, 2^55555005 is an apocalyptic number.

55555005 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55555005 is a deficient number, since it is larger than the sum of its proper divisors (45636675).

55555005 is a wasteful number, since it uses less digits than its factorization.

55555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14681.

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 55555005 is about 7453.5229925184. The cubic root of 55555005 is about 381.5701537227.

The spelling of 55555005 in words is "fifty-five million, five hundred fifty-five thousand, five".