55518547 has 8 divisors (see below), whose sum is σ = 64925696. Its totient is φ = 46480392.

The previous prime is 55518539. The next prime is 55518559. The reversal of 55518547 is 74581555.

It is a happy number.

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

It is not a de Polignac number, because 55518547 - 2³ = 55518539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55518517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91923 + ... + 92524.

It is an arithmetic number, because the mean of its divisors is an integer number (8115712).

Almost surely, 2^55518547 is an apocalyptic number.

55518547 is a deficient number, since it is larger than the sum of its proper divisors (9407149).

55518547 is a wasteful number, since it uses less digits than its factorization.

55518547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184497.

The product of its digits is 140000, while the sum is 40.

The square root of 55518547 is about 7451.0769020323. The cubic root of 55518547 is about 381.4866669221.

It can be divided in two parts, 55518 and 547, that added together give a palindrome (56065).

The spelling of 55518547 in words is "fifty-five million, five hundred eighteen thousand, five hundred forty-seven".