49218891 has 4 divisors (see below), whose sum is σ = 65625192. Its totient is φ = 32812592.

The previous prime is 49218889. The next prime is 49218913. The reversal of 49218891 is 19881294.

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 49218891 - 2¹ = 49218889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49218391) 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, 8203146 + ... + 8203151.

It is an arithmetic number, because the mean of its divisors is an integer number (16406298).

Almost surely, 2^49218891 is an apocalyptic number.

49218891 is a deficient number, since it is larger than the sum of its proper divisors (16406301).

49218891 is a wasteful number, since it uses less digits than its factorization.

49218891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16406300.

The product of its digits is 41472, while the sum is 42.

The square root of 49218891 is about 7015.6176492166. The cubic root of 49218891 is about 366.4746521731.

The spelling of 49218891 in words is "forty-nine million, two hundred eighteen thousand, eight hundred ninety-one".