203130400442401 has 4 divisors (see below), whose sum is σ = 203130564173892. Its totient is φ = 203130236710912.

The previous prime is 203130400442381. The next prime is 203130400442503. The reversal of 203130400442401 is 104244004031302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28789405811776 + 174340994630625 = 5365576^2 + 13203825^2 .

It is a cyclic number.

It is not a de Polignac number, because 203130400442401 - 2⁷ = 203130400442273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203130400442401.

It is not an unprimeable number, because it can be changed into a prime (203130400422401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79990480 + ... + 82490833.

It is an arithmetic number, because the mean of its divisors is an integer number (50782641043473).

Almost surely, 2^{203130400442401} is an apocalyptic number.

It is an amenable number.

203130400442401 is a deficient number, since it is larger than the sum of its proper divisors (163731491).

203130400442401 is a wasteful number, since it uses less digits than its factorization.

203130400442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163731490.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 203130400442401 its reverse (104244004031302), we get a palindrome (307374404473703).

The spelling of 203130400442401 in words is "two hundred three trillion, one hundred thirty billion, four hundred million, four hundred forty-two thousand, four hundred one".