49218566 has 4 divisors (see below), whose sum is σ = 73827852. Its totient is φ = 24609282.

The previous prime is 49218563. The next prime is 49218581. The reversal of 49218566 is 66581294.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49218563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12304640 + ... + 12304643.

It is an arithmetic number, because the mean of its divisors is an integer number (18456963).

Almost surely, 2^49218566 is an apocalyptic number.

49218566 is a deficient number, since it is larger than the sum of its proper divisors (24609286).

49218566 is a wasteful number, since it uses less digits than its factorization.

49218566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24609285.

The product of its digits is 103680, while the sum is 41.

The square root of 49218566 is about 7015.5944865706. The cubic root of 49218566 is about 366.4738455416.

The spelling of 49218566 in words is "forty-nine million, two hundred eighteen thousand, five hundred sixty-six".