203343323221957 has 2 divisors, whose sum is σ = 203343323221958. Its totient is φ = 203343323221956.

The previous prime is 203343323221901. The next prime is 203343323222099. The reversal of 203343323221957 is 759122323343302.

203343323221957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118530993193636 + 84812330028321 = 10887194^2 + 9209361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203343323221957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203343323221957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203343323222957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101671661610978 + 101671661610979.

It is an arithmetic number, because the mean of its divisors is an integer number (101671661610979).

Almost surely, 2^{203343323221957} is an apocalyptic number.

It is an amenable number.

203343323221957 is a deficient number, since it is larger than the sum of its proper divisors (1).

203343323221957 is an equidigital number, since it uses as much as digits as its factorization.

203343323221957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 49.

The spelling of 203343323221957 in words is "two hundred three trillion, three hundred forty-three billion, three hundred twenty-three million, two hundred twenty-one thousand, nine hundred fifty-seven".