55807015 has 12 divisors (see below), whose sum is σ = 73610712. Its totient is φ = 40586480.

The previous prime is 55807013. The next prime is 55807021. The reversal of 55807015 is 51070855.

55807015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55807015 - 2¹ = 55807013 is a prime.

It is a super-5 number, since 5×55807015⁵ (a number of 40 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55807013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45517 + ... + 46726.

It is an arithmetic number, because the mean of its divisors is an integer number (6134226).

Almost surely, 2^55807015 is an apocalyptic number.

55807015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55807015 is a deficient number, since it is larger than the sum of its proper divisors (17803697).

55807015 is a wasteful number, since it uses less digits than its factorization.

55807015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92270 (or 92259 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 55807015 is about 7470.4092926693. The cubic root of 55807015 is about 382.1462461882.

The spelling of 55807015 in words is "fifty-five million, eight hundred seven thousand, fifteen".