2215621146449 has 2 divisors, whose sum is σ = 2215621146450. Its totient is φ = 2215621146448.

The previous prime is 2215621146443. The next prime is 2215621146467. The reversal of 2215621146449 is 9446411265122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1992995710225 + 222625436224 = 1411735^2 + 471832^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215621146449 - 2³⁶ = 2146901669713 is a prime.

It is a super-2 number, since 2×2215621146449² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2215621146443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107810573224 + 1107810573225.

It is an arithmetic number, because the mean of its divisors is an integer number (1107810573225).

Almost surely, 2^{2215621146449} is an apocalyptic number.

It is an amenable number.

2215621146449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215621146449 is an equidigital number, since it uses as much as digits as its factorization.

2215621146449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 47.

The spelling of 2215621146449 in words is "two trillion, two hundred fifteen billion, six hundred twenty-one million, one hundred forty-six thousand, four hundred forty-nine".