49218563 has 2 divisors, whose sum is σ = 49218564. Its totient is φ = 49218562.

The previous prime is 49218523. The next prime is 49218581. The reversal of 49218563 is 36581294.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49218563 - 2²⁰ = 48169987 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (49218523) 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, 24609281 + 24609282.

It is an arithmetic number, because the mean of its divisors is an integer number (24609282).

Almost surely, 2^49218563 is an apocalyptic number.

49218563 is a deficient number, since it is larger than the sum of its proper divisors (1).

49218563 is an equidigital number, since it uses as much as digits as its factorization.

49218563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 49218563 is about 7015.5942727612. The cubic root of 49218563 is about 366.4738380957.

The spelling of 49218563 in words is "forty-nine million, two hundred eighteen thousand, five hundred sixty-three".