2211720863 has 8 divisors (see below), whose sum is σ = 2434139856. Its totient is φ = 1992860800.

The previous prime is 2211720857. The next prime is 2211720869. The reversal of 2211720863 is 3680271122.

It is an interprime number because it is at equal distance from previous prime (2211720857) and next prime (2211720869).

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 2211720863 - 2⁸ = 2211720607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211720869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888428 + ... + 890913.

It is an arithmetic number, because the mean of its divisors is an integer number (304267482).

Almost surely, 2^2211720863 is an apocalyptic number.

2211720863 is a deficient number, since it is larger than the sum of its proper divisors (222418993).

2211720863 is a wasteful number, since it uses less digits than its factorization.

2211720863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779465.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2211720863 is about 47028.9364434281. The cubic root of 2211720863 is about 1302.8970623474.

Adding to 2211720863 its reverse (3680271122), we get a palindrome (5891991985).

The spelling of 2211720863 in words is "two billion, two hundred eleven million, seven hundred twenty thousand, eight hundred sixty-three".