2043450733721 has 2 divisors, whose sum is σ = 2043450733722. Its totient is φ = 2043450733720.

The previous prime is 2043450733717. The next prime is 2043450733757. The reversal of 2043450733721 is 1273370543402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1387130395225 + 656320338496 = 1177765^2 + 810136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043450733721 - 2² = 2043450733717 is a prime.

It is a super-2 number, since 2×2043450733721² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2043450733921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021725366860 + 1021725366861.

It is an arithmetic number, because the mean of its divisors is an integer number (1021725366861).

Almost surely, 2^{2043450733721} is an apocalyptic number.

It is an amenable number.

2043450733721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043450733721 is an equidigital number, since it uses as much as digits as its factorization.

2043450733721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 41.

The spelling of 2043450733721 in words is "two trillion, forty-three billion, four hundred fifty million, seven hundred thirty-three thousand, seven hundred twenty-one".