201543243441603 has 16 divisors (see below), whose sum is σ = 308656797811200. Its totient is φ = 114588836182656.

The previous prime is 201543243441539. The next prime is 201543243441667. The reversal of 201543243441603 is 306144342345102.

It is an interprime number because it is at equal distance from previous prime (201543243441539) and next prime (201543243441667).

It is not a de Polignac number, because 201543243441603 - 2⁶ = 201543243441539 is a prime.

It is a super-2 number, since 2×201543243441603² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201543243441703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24113808150 + ... + 24113816507.

It is an arithmetic number, because the mean of its divisors is an integer number (19291049863200).

Almost surely, 2^{201543243441603} is an apocalyptic number.

201543243441603 is a deficient number, since it is larger than the sum of its proper divisors (107113554369597).

201543243441603 is a wasteful number, since it uses less digits than its factorization.

201543243441603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48227624866.

The product of its (nonzero) digits is 829440, while the sum is 42.

Adding to 201543243441603 its reverse (306144342345102), we get a palindrome (507687585786705).

The spelling of 201543243441603 in words is "two hundred one trillion, five hundred forty-three billion, two hundred forty-three million, four hundred forty-one thousand, six hundred three".