55518743 has 4 divisors (see below), whose sum is σ = 63450000. Its totient is φ = 47587488.

The previous prime is 55518733. The next prime is 55518761. The reversal of 55518743 is 34781555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55518743 - 2¹⁰ = 55517719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55518697 and 55518706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965618 + ... + 3965631.

It is an arithmetic number, because the mean of its divisors is an integer number (15862500).

Almost surely, 2^55518743 is an apocalyptic number.

55518743 is a deficient number, since it is larger than the sum of its proper divisors (7931257).

55518743 is an equidigital number, since it uses as much as digits as its factorization.

55518743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931256.

The product of its digits is 84000, while the sum is 38.

The square root of 55518743 is about 7451.0900544820. The cubic root of 55518743 is about 381.4871158490.

The spelling of 55518743 in words is "fifty-five million, five hundred eighteen thousand, seven hundred forty-three".