55518671 has 4 divisors (see below), whose sum is σ = 59789352. Its totient is φ = 51247992.

The previous prime is 55518667. The next prime is 55518677. The reversal of 55518671 is 17681555.

It is a happy number.

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 55518671 - 2² = 55518667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518677) 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, 2135321 + ... + 2135346.

It is an arithmetic number, because the mean of its divisors is an integer number (14947338).

Almost surely, 2^55518671 is an apocalyptic number.

55518671 is a deficient number, since it is larger than the sum of its proper divisors (4270681).

55518671 is a wasteful number, since it uses less digits than its factorization.

55518671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270680.

The product of its digits is 42000, while the sum is 38.

The square root of 55518671 is about 7451.0852229726. The cubic root of 55518671 is about 381.4869509372.

The spelling of 55518671 in words is "fifty-five million, five hundred eighteen thousand, six hundred seventy-one".