55520515 has 8 divisors (see below), whose sum is σ = 67537728. Its totient is φ = 43807680.

The previous prime is 55520513. The next prime is 55520537. The reversal of 55520515 is 51502555.

It is a happy number.

55520515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55520515 - 2¹ = 55520513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55520513) 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 7 ways as a sum of consecutive naturals, for example, 75691 + ... + 76420.

It is an arithmetic number, because the mean of its divisors is an integer number (8442216).

Almost surely, 2^55520515 is an apocalyptic number.

55520515 is a deficient number, since it is larger than the sum of its proper divisors (12017213).

55520515 is a wasteful number, since it uses less digits than its factorization.

55520515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152189.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 55520515 is about 7451.2089623094. The cubic root of 55520515 is about 381.4911744662.

The spelling of 55520515 in words is "fifty-five million, five hundred twenty thousand, five hundred fifteen".