2216021251 has 2 divisors, whose sum is σ = 2216021252. Its totient is φ = 2216021250.

The previous prime is 2216021231. The next prime is 2216021287. The reversal of 2216021251 is 1521206122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2216021251 - 2⁷ = 2216021123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2216021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108010625 + 1108010626.

It is an arithmetic number, because the mean of its divisors is an integer number (1108010626).

Almost surely, 2^2216021251 is an apocalyptic number.

2216021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216021251 is an equidigital number, since it uses as much as digits as its factorization.

2216021251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2216021251 is about 47074.6349003367. The cubic root of 2216021251 is about 1303.7409505471.

Adding to 2216021251 its reverse (1521206122), we get a palindrome (3737227373).

The spelling of 2216021251 in words is "two billion, two hundred sixteen million, twenty-one thousand, two hundred fifty-one".