203431424551 has 2 divisors, whose sum is σ = 203431424552. Its totient is φ = 203431424550.

The previous prime is 203431424543. The next prime is 203431424587. The reversal of 203431424551 is 155424134302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203431424551 - 2³ = 203431424543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203431424591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101715712275 + 101715712276.

It is an arithmetic number, because the mean of its divisors is an integer number (101715712276).

Almost surely, 2^203431424551 is an apocalyptic number.

203431424551 is a deficient number, since it is larger than the sum of its proper divisors (1).

203431424551 is an equidigital number, since it uses as much as digits as its factorization.

203431424551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 203431424551 its reverse (155424134302), we get a palindrome (358855558853).

The spelling of 203431424551 in words is "two hundred three billion, four hundred thirty-one million, four hundred twenty-four thousand, five hundred fifty-one".