55039215 has 32 divisors (see below), whose sum is σ = 109794816. Its totient is φ = 22872960.

The previous prime is 55039169. The next prime is 55039277. The reversal of 55039215 is 51293055.

It is not a de Polignac number, because 55039215 - 2⁶ = 55039151 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 22672 + ... + 24981.

It is an arithmetic number, because the mean of its divisors is an integer number (3431088).

Almost surely, 2^55039215 is an apocalyptic number.

55039215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55039215 is a deficient number, since it is larger than the sum of its proper divisors (54755601).

55039215 is a wasteful number, since it uses less digits than its factorization.

55039215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47679.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 55039215 is about 7418.8418907536. The cubic root of 55039215 is about 380.3856081070.

The spelling of 55039215 in words is "fifty-five million, thirty-nine thousand, two hundred fifteen".