1863066221 has 2 divisors, whose sum is σ = 1863066222. Its totient is φ = 1863066220.

The previous prime is 1863066197. The next prime is 1863066307. The reversal of 1863066221 is 1226603681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1851580900 + 11485321 = 43030^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1863066221 - 2⁶ = 1863066157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1863066421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 931533110 + 931533111.

It is an arithmetic number, because the mean of its divisors is an integer number (931533111).

Almost surely, 2^1863066221 is an apocalyptic number.

It is an amenable number.

1863066221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863066221 is an equidigital number, since it uses as much as digits as its factorization.

1863066221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1863066221 is about 43163.2508159430. The cubic root of 1863066221 is about 1230.4843579005.

The spelling of 1863066221 in words is "one billion, eight hundred sixty-three million, sixty-six thousand, two hundred twenty-one".