1353221051543 has 2 divisors, whose sum is σ = 1353221051544. Its totient is φ = 1353221051542.

The previous prime is 1353221051503. The next prime is 1353221051551. The reversal of 1353221051543 is 3451501223531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1353221051543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1353221051503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676610525771 + 676610525772.

It is an arithmetic number, because the mean of its divisors is an integer number (676610525772).

Almost surely, 2^{1353221051543} is an apocalyptic number.

1353221051543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1353221051543 is an equidigital number, since it uses as much as digits as its factorization.

1353221051543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 1353221051543 in words is "one trillion, three hundred fifty-three billion, two hundred twenty-one million, fifty-one thousand, five hundred forty-three".