43273037721503 has 2 divisors, whose sum is σ = 43273037721504. Its totient is φ = 43273037721502.

The previous prime is 43273037721439. The next prime is 43273037721541. The reversal of 43273037721503 is 30512773037234.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43273037721503 - 2⁶ = 43273037721439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43273037721553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21636518860751 + 21636518860752.

It is an arithmetic number, because the mean of its divisors is an integer number (21636518860752).

Almost surely, 2^{43273037721503} is an apocalyptic number.

43273037721503 is a deficient number, since it is larger than the sum of its proper divisors (1).

43273037721503 is an equidigital number, since it uses as much as digits as its factorization.

43273037721503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 47.

The spelling of 43273037721503 in words is "forty-three trillion, two hundred seventy-three billion, thirty-seven million, seven hundred twenty-one thousand, five hundred three".