55120015 has 16 divisors (see below), whose sum is σ = 68659200. Its totient is φ = 42435360.

The previous prime is 55120003. The next prime is 55120061. The reversal of 55120015 is 51002155.

It is not a de Polignac number, because 55120015 - 2¹⁷ = 54988943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55119974 and 55120001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29952 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (4291200).

Almost surely, 2^55120015 is an apocalyptic number.

55120015 is a deficient number, since it is larger than the sum of its proper divisors (13539185).

55120015 is a wasteful number, since it uses less digits than its factorization.

55120015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 55120015 is about 7424.2854875065. The cubic root of 55120015 is about 380.5716580546.

The spelling of 55120015 in words is "fifty-five million, one hundred twenty thousand, fifteen".