50218643 has 2 divisors, whose sum is σ = 50218644. Its totient is φ = 50218642.

The previous prime is 50218639. The next prime is 50218661. The reversal of 50218643 is 34681205.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50218643 - 2² = 50218639 is a prime.

It is a super-2 number, since 2×50218643² = 5043824209522898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50218603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25109321 + 25109322.

It is an arithmetic number, because the mean of its divisors is an integer number (25109322).

Almost surely, 2^50218643 is an apocalyptic number.

50218643 is a deficient number, since it is larger than the sum of its proper divisors (1).

50218643 is an equidigital number, since it uses as much as digits as its factorization.

50218643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 50218643 is about 7086.5113419792. The cubic root of 50218643 is about 368.9393608294.

Adding to 50218643 its reverse (34681205), we get a palindrome (84899848).

The spelling of 50218643 in words is "fifty million, two hundred eighteen thousand, six hundred forty-three".