4221431665 has 48 divisors (see below), whose sum is σ = 5871237120. Its totient is φ = 2907273600.

The previous prime is 4221431657. The next prime is 4221431671. The reversal of 4221431665 is 5661341224.

It is not a de Polignac number, because 4221431665 - 2³ = 4221431657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4221431665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 879091 + ... + 883879.

It is an arithmetic number, because the mean of its divisors is an integer number (122317440).

Almost surely, 2^4221431665 is an apocalyptic number.

It is an amenable number.

4221431665 is a deficient number, since it is larger than the sum of its proper divisors (1649805455).

4221431665 is a wasteful number, since it uses less digits than its factorization.

4221431665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894 (or 4883 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 4221431665 is about 64972.5454711450. The cubic root of 4221431665 is about 1616.1683137241.

Adding to 4221431665 its reverse (5661341224), we get a palindrome (9882772889).

The spelling of 4221431665 in words is "four billion, two hundred twenty-one million, four hundred thirty-one thousand, six hundred sixty-five".