2215666455 has 16 divisors (see below), whose sum is σ = 3545710944. Its totient is φ = 1181473920.

The previous prime is 2215666451. The next prime is 2215666459. The reversal of 2215666455 is 5546665122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2215666451) and next prime (2215666459).

It is not a de Polignac number, because 2215666455 - 2² = 2215666451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215666451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106185 + ... + 125325.

It is an arithmetic number, because the mean of its divisors is an integer number (221606934).

Almost surely, 2^2215666455 is an apocalyptic number.

2215666455 is a deficient number, since it is larger than the sum of its proper divisors (1330044489).

2215666455 is a wasteful number, since it uses less digits than its factorization.

2215666455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26866.

The product of its digits is 432000, while the sum is 42.

The square root of 2215666455 is about 47070.8663081529. The cubic root of 2215666455 is about 1303.6713683680.

The spelling of 2215666455 in words is "two billion, two hundred fifteen million, six hundred sixty-six thousand, four hundred fifty-five".