2105257841 has 2 divisors, whose sum is σ = 2105257842. Its totient is φ = 2105257840.

The previous prime is 2105257823. The next prime is 2105257897. The reversal of 2105257841 is 1487525012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1788951616 + 316306225 = 42296^2 + 17785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105257841 is a prime.

It is a super-2 number, since 2×2105257841² = 8864221154183962562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2105257801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052628920 + 1052628921.

It is an arithmetic number, because the mean of its divisors is an integer number (1052628921).

Almost surely, 2^2105257841 is an apocalyptic number.

It is an amenable number.

2105257841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105257841 is an equidigital number, since it uses as much as digits as its factorization.

2105257841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 2105257841 is about 45883.0888345586. The cubic root of 2105257841 is about 1281.6470173937.

The spelling of 2105257841 in words is "two billion, one hundred five million, two hundred fifty-seven thousand, eight hundred forty-one".