42216651 has 24 divisors (see below), whose sum is σ = 64496640. Its totient is φ = 26535600.

The previous prime is 42216649. The next prime is 42216659. The reversal of 42216651 is 15661224.

42216651 is a `hidden beast` number, since 4 + 2 + 2 + 1 + 6 + 651 = 666.

It is not a de Polignac number, because 42216651 - 2¹ = 42216649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42216659) 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 in 23 ways as a sum of consecutive naturals, for example, 45886 + ... + 46796.

It is an arithmetic number, because the mean of its divisors is an integer number (2687360).

Almost surely, 2^42216651 is an apocalyptic number.

42216651 is a deficient number, since it is larger than the sum of its proper divisors (22279989).

42216651 is a wasteful number, since it uses less digits than its factorization.

42216651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207 (or 1204 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 42216651 is about 6497.4341858922. The cubic root of 42216651 is about 348.1993259597.

Adding to 42216651 its reverse (15661224), we get a palindrome (57877875).

The spelling of 42216651 in words is "forty-two million, two hundred sixteen thousand, six hundred fifty-one".