203442231551 has 8 divisors (see below), whose sum is σ = 220203777024. Its totient is φ = 186839563680.

The previous prime is 203442231533. The next prime is 203442231557. The reversal of 203442231551 is 155132244302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203442231551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203442231557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39716735 + ... + 39721856.

It is an arithmetic number, because the mean of its divisors is an integer number (27525472128).

Almost surely, 2^203442231551 is an apocalyptic number.

203442231551 is a deficient number, since it is larger than the sum of its proper divisors (16761545473).

203442231551 is a wasteful number, since it uses less digits than its factorization.

203442231551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79438801.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 203442231551 its reverse (155132244302), we get a palindrome (358574475853).

The spelling of 203442231551 in words is "two hundred three billion, four hundred forty-two million, two hundred thirty-one thousand, five hundred fifty-one".