43521036154493 has 2 divisors, whose sum is σ = 43521036154494. Its totient is φ = 43521036154492.

The previous prime is 43521036154487. The next prime is 43521036154501. The reversal of 43521036154493 is 39445163012534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24376368441049 + 19144667713444 = 4937243^2 + 4375462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43521036154493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43521036154793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760518077246 + 21760518077247.

It is an arithmetic number, because the mean of its divisors is an integer number (21760518077247).

Almost surely, 2^{43521036154493} is an apocalyptic number.

It is an amenable number.

43521036154493 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521036154493 is an equidigital number, since it uses as much as digits as its factorization.

43521036154493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 43521036154493 in words is "forty-three trillion, five hundred twenty-one billion, thirty-six million, one hundred fifty-four thousand, four hundred ninety-three".