55518833 has 8 divisors (see below), whose sum is σ = 57235752. Its totient is φ = 53813376.

The previous prime is 55518829. The next prime is 55518863. The reversal of 55518833 is 33881555.

It can be written as a sum of positive squares in 4 ways, for example, as 2053489 + 53465344 = 1433^2 + 7312^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55518833 - 2² = 55518829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55518863) 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, 7541 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (7154469).

Almost surely, 2^55518833 is an apocalyptic number.

It is an amenable number.

55518833 is a deficient number, since it is larger than the sum of its proper divisors (1716919).

55518833 is a wasteful number, since it uses less digits than its factorization.

55518833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 72000, while the sum is 38.

The square root of 55518833 is about 7451.0960938643. The cubic root of 55518833 is about 381.4873219885.

The spelling of 55518833 in words is "fifty-five million, five hundred eighteen thousand, eight hundred thirty-three".