2101855733 has 2 divisors, whose sum is σ = 2101855734. Its totient is φ = 2101855732.

The previous prime is 2101855703. The next prime is 2101855757. The reversal of 2101855733 is 3375581012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2024820004 + 77035729 = 44998^2 + 8777^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101855733 - 2⁶ = 2101855669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101855693 and 2101855702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101855703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050927866 + 1050927867.

It is an arithmetic number, because the mean of its divisors is an integer number (1050927867).

Almost surely, 2^2101855733 is an apocalyptic number.

It is an amenable number.

2101855733 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101855733 is an equidigital number, since it uses as much as digits as its factorization.

2101855733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 2101855733 is about 45846.0001854033. Note that the first 3 decimals coincide. The cubic root of 2101855733 is about 1280.9562623464.

The spelling of 2101855733 in words is "two billion, one hundred one million, eight hundred fifty-five thousand, seven hundred thirty-three".