1002216855 has 8 divisors (see below), whose sum is σ = 1603546992. Its totient is φ = 534515648.

The previous prime is 1002216823. The next prime is 1002216857. The reversal of 1002216855 is 5586122001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002216855 - 2⁵ = 1002216823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002216857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33407214 + ... + 33407243.

It is an arithmetic number, because the mean of its divisors is an integer number (200443374).

Almost surely, 2^1002216855 is an apocalyptic number.

1002216855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1002216855 is a deficient number, since it is larger than the sum of its proper divisors (601330137).

1002216855 is an equidigital number, since it uses as much as digits as its factorization.

1002216855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66814465.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1002216855 is about 31657.8087523442. The cubic root of 1002216855 is about 1000.7384062886.

Adding to 1002216855 its reverse (5586122001), we get a palindrome (6588338856).

The spelling of 1002216855 in words is "one billion, two million, two hundred sixteen thousand, eight hundred fifty-five".