203431339981 has 2 divisors, whose sum is σ = 203431339982. Its totient is φ = 203431339980.

The previous prime is 203431339963. The next prime is 203431340003. The reversal of 203431339981 is 189933134302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174765802500 + 28665537481 = 418050^2 + 169309^2 .

It is a cyclic number.

It is not a de Polignac number, because 203431339981 - 2²⁹ = 202894469069 is a prime.

It is a super-2 number, since 2×203431339981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203431331981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101715669990 + 101715669991.

It is an arithmetic number, because the mean of its divisors is an integer number (101715669991).

Almost surely, 2^203431339981 is an apocalyptic number.

It is an amenable number.

203431339981 is a deficient number, since it is larger than the sum of its proper divisors (1).

203431339981 is an equidigital number, since it uses as much as digits as its factorization.

203431339981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 203431339981 in words is "two hundred three billion, four hundred thirty-one million, three hundred thirty-nine thousand, nine hundred eighty-one".