55518945 has 8 divisors (see below), whose sum is σ = 88830336. Its totient is φ = 29610096.

The previous prime is 55518937. The next prime is 55518971. The reversal of 55518945 is 54981555.

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 55518945 - 2³ = 55518937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55518897 and 55518906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850617 + ... + 1850646.

It is an arithmetic number, because the mean of its divisors is an integer number (11103792).

Almost surely, 2^55518945 is an apocalyptic number.

It is an amenable number.

55518945 is a deficient number, since it is larger than the sum of its proper divisors (33311391).

55518945 is a wasteful number, since it uses less digits than its factorization.

55518945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701271.

The product of its digits is 180000, while the sum is 42.

The square root of 55518945 is about 7451.1036095333. The cubic root of 55518945 is about 381.4875785174.

The spelling of 55518945 in words is "fifty-five million, five hundred eighteen thousand, nine hundred forty-five".