55556515 has 16 divisors (see below), whose sum is σ = 76397760. Its totient is φ = 37992960.

The previous prime is 55556509. The next prime is 55556519. The reversal of 55556515 is 51565555.

It is not a de Polignac number, because 55556515 - 2⁵ = 55556483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55556519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12375 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (4774860).

Almost surely, 2^55556515 is an apocalyptic number.

55556515 is a deficient number, since it is larger than the sum of its proper divisors (20841245).

55556515 is a wasteful number, since it uses less digits than its factorization.

55556515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302.

The product of its digits is 93750, while the sum is 37.

The square root of 55556515 is about 7453.6242862114. The cubic root of 55556515 is about 381.5736107512.

The spelling of 55556515 in words is "fifty-five million, five hundred fifty-six thousand, five hundred fifteen".