2381682221 has 2 divisors, whose sum is σ = 2381682222. Its totient is φ = 2381682220.

The previous prime is 2381682179. The next prime is 2381682239. The reversal of 2381682221 is 1222861832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2363320996 + 18361225 = 48614^2 + 4285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2381682221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2381682421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190841110 + 1190841111.

It is an arithmetic number, because the mean of its divisors is an integer number (1190841111).

Almost surely, 2^2381682221 is an apocalyptic number.

It is an amenable number.

2381682221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381682221 is an equidigital number, since it uses as much as digits as its factorization.

2381682221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 2381682221 is about 48802.4817094377. The cubic root of 2381682221 is about 1335.4509403513.

The spelling of 2381682221 in words is "two billion, three hundred eighty-one million, six hundred eighty-two thousand, two hundred twenty-one".