220616287 has 2 divisors, whose sum is σ = 220616288. Its totient is φ = 220616286.

The previous prime is 220616267. The next prime is 220616339. The reversal of 220616287 is 782616022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220616287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220616257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110308143 + 110308144.

It is an arithmetic number, because the mean of its divisors is an integer number (110308144).

Almost surely, 2^220616287 is an apocalyptic number.

220616287 is a deficient number, since it is larger than the sum of its proper divisors (1).

220616287 is an equidigital number, since it uses as much as digits as its factorization.

220616287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 220616287 is about 14853.1574757693. The cubic root of 220616287 is about 604.2442463126.

The spelling of 220616287 in words is "two hundred twenty million, six hundred sixteen thousand, two hundred eighty-seven".