2215311643 has 2 divisors, whose sum is σ = 2215311644. Its totient is φ = 2215311642.

The previous prime is 2215311617. The next prime is 2215311719. The reversal of 2215311643 is 3461135122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2215311643 - 2¹³ = 2215303451 is a prime.

It is a super-2 number, since 2×2215311643² = 9815211351222718898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2215311143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107655821 + 1107655822.

It is an arithmetic number, because the mean of its divisors is an integer number (1107655822).

Almost surely, 2^2215311643 is an apocalyptic number.

2215311643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215311643 is an equidigital number, since it uses as much as digits as its factorization.

2215311643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 2215311643 is about 47067.0972442533. The cubic root of 2215311643 is about 1303.6017756219.

Adding to 2215311643 its reverse (3461135122), we get a palindrome (5676446765).

The spelling of 2215311643 in words is "two billion, two hundred fifteen million, three hundred eleven thousand, six hundred forty-three".