2216207781751 has 8 divisors (see below), whose sum is σ = 2332876736000. Its totient is φ = 2099541471480.

The previous prime is 2216207781737. The next prime is 2216207781779. The reversal of 2216207781751 is 1571877026122.

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 2216207781751 - 2⁹ = 2216207781239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2216207781695 and 2216207781704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216207781721) 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, 1192900 + ... + 2419798.

It is an arithmetic number, because the mean of its divisors is an integer number (291609592000).

Almost surely, 2^{2216207781751} is an apocalyptic number.

2216207781751 is a deficient number, since it is larger than the sum of its proper divisors (116668954249).

2216207781751 is a wasteful number, since it uses less digits than its factorization.

2216207781751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321989.

The product of its (nonzero) digits is 658560, while the sum is 49.

The spelling of 2216207781751 in words is "two trillion, two hundred sixteen billion, two hundred seven million, seven hundred eighty-one thousand, seven hundred fifty-one".