203551544543 has 2 divisors, whose sum is σ = 203551544544. Its totient is φ = 203551544542.

The previous prime is 203551544467. The next prime is 203551544597. The reversal of 203551544543 is 345445155302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203551544543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203551544543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203557544543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101775772271 + 101775772272.

It is an arithmetic number, because the mean of its divisors is an integer number (101775772272).

Almost surely, 2^203551544543 is an apocalyptic number.

203551544543 is a deficient number, since it is larger than the sum of its proper divisors (1).

203551544543 is an equidigital number, since it uses as much as digits as its factorization.

203551544543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 203551544543 its reverse (345445155302), we get a palindrome (548996699845).

The spelling of 203551544543 in words is "two hundred three billion, five hundred fifty-one million, five hundred forty-four thousand, five hundred forty-three".