203031223313 has 2 divisors, whose sum is σ = 203031223314. Its totient is φ = 203031223312.

The previous prime is 203031223303. The next prime is 203031223319. The reversal of 203031223313 is 313322130302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187954330369 + 15076892944 = 433537^2 + 122788^2 .

It is a cyclic number.

It is not a de Polignac number, because 203031223313 - 2¹⁸ = 203030961169 is a prime.

It is not a weakly prime, because it can be changed into another prime (203031223319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101515611656 + 101515611657.

It is an arithmetic number, because the mean of its divisors is an integer number (101515611657).

Almost surely, 2^203031223313 is an apocalyptic number.

It is an amenable number.

203031223313 is a deficient number, since it is larger than the sum of its proper divisors (1).

203031223313 is an equidigital number, since it uses as much as digits as its factorization.

203031223313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 203031223313 its reverse (313322130302), we get a palindrome (516353353615).

The spelling of 203031223313 in words is "two hundred three billion, thirty-one million, two hundred twenty-three thousand, three hundred thirteen".