55518513 has 8 divisors (see below), whose sum is σ = 77920800. Its totient is φ = 35064288.

The previous prime is 55518509. The next prime is 55518517. The reversal of 55518513 is 31581555.

55518513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55518509) and next prime (55518517).

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

It is not a de Polignac number, because 55518513 - 2² = 55518509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55518517) 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, 486948 + ... + 487061.

It is an arithmetic number, because the mean of its divisors is an integer number (9740100).

Almost surely, 2^55518513 is an apocalyptic number.

It is an amenable number.

55518513 is a deficient number, since it is larger than the sum of its proper divisors (22402287).

55518513 is a wasteful number, since it uses less digits than its factorization.

55518513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974031.

The product of its digits is 15000, while the sum is 33.

The square root of 55518513 is about 7451.0746204826. The cubic root of 55518513 is about 381.4865890470.

The spelling of 55518513 in words is "fifty-five million, five hundred eighteen thousand, five hundred thirteen".