42218651 has 2 divisors, whose sum is σ = 42218652. Its totient is φ = 42218650.

The previous prime is 42218641. The next prime is 42218677. The reversal of 42218651 is 15681224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42218651 - 2⁶ = 42218587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42218641) 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, 21109325 + 21109326.

It is an arithmetic number, because the mean of its divisors is an integer number (21109326).

Almost surely, 2^42218651 is an apocalyptic number.

42218651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42218651 is an equidigital number, since it uses as much as digits as its factorization.

42218651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 42218651 is about 6497.5880909765. The cubic root of 42218651 is about 348.2048244825.

Adding to 42218651 its reverse (15681224), we get a palindrome (57899875).

The spelling of 42218651 in words is "forty-two million, two hundred eighteen thousand, six hundred fifty-one".