55287515 has 8 divisors (see below), whose sum is σ = 69229728. Its totient is φ = 42306880.

The previous prime is 55287497. The next prime is 55287527. The reversal of 55287515 is 51578255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55287515 - 2⁸ = 55287259 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 240266 + ... + 240495.

It is an arithmetic number, because the mean of its divisors is an integer number (8653716).

Almost surely, 2^55287515 is an apocalyptic number.

55287515 is a deficient number, since it is larger than the sum of its proper divisors (13942213).

55287515 is a wasteful number, since it uses less digits than its factorization.

55287515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480789.

The product of its digits is 70000, while the sum is 38.

The square root of 55287515 is about 7435.5574774189. The cubic root of 55287515 is about 380.9567649334.

The spelling of 55287515 in words is "fifty-five million, two hundred eighty-seven thousand, five hundred fifteen".