203231201331013 has 4 divisors (see below), whose sum is σ = 203231294553868. Its totient is φ = 203231108108160.

The previous prime is 203231201330957. The next prime is 203231201331029. The reversal of 203231201331013 is 310133102132302.

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 140981973257889 + 62249228073124 = 11873583^2 + 7889818^2 .

It is a cyclic number.

It is not a de Polignac number, because 203231201331013 - 2²⁹ = 203230664460101 is a prime.

It is a super-4 number, since 4×203231201331013⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203231201331313) 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, 43261068 + ... + 47728213.

It is an arithmetic number, because the mean of its divisors is an integer number (50807823638467).

Almost surely, 2^{203231201331013} is an apocalyptic number.

It is an amenable number.

203231201331013 is a deficient number, since it is larger than the sum of its proper divisors (93222855).

203231201331013 is an equidigital number, since it uses as much as digits as its factorization.

203231201331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93222854.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 203231201331013 its reverse (310133102132302), we get a palindrome (513364303463315).

The spelling of 203231201331013 in words is "two hundred three trillion, two hundred thirty-one billion, two hundred one million, three hundred thirty-one thousand, thirteen".