2381949221 has 2 divisors, whose sum is σ = 2381949222. Its totient is φ = 2381949220.

The previous prime is 2381949209. The next prime is 2381949233. The reversal of 2381949221 is 1229491832.

2381949221 = 34510² + 34511².

It is a balanced prime because it is at equal distance from previous prime (2381949209) and next prime (2381949233).

It can be written as a sum of positive squares in only one way, i.e., 1191009121 + 1190940100 = 34511^2 + 34510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2381949221 - 2²² = 2377754917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2381945221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190974610 + 1190974611.

It is an arithmetic number, because the mean of its divisors is an integer number (1190974611).

Almost surely, 2^2381949221 is an apocalyptic number.

2381949221 is the 34511-st centered square number.

It is an amenable number.

2381949221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381949221 is an equidigital number, since it uses as much as digits as its factorization.

2381949221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 2381949221 is about 48805.2171493991. The cubic root of 2381949221 is about 1335.5008423456.

The spelling of 2381949221 in words is "two billion, three hundred eighty-one million, nine hundred forty-nine thousand, two hundred twenty-one".