203312322251 has 2 divisors, whose sum is σ = 203312322252. Its totient is φ = 203312322250.

The previous prime is 203312322179. The next prime is 203312322253. The reversal of 203312322251 is 152223213302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203312322251 is a prime.

Together with 203312322253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203312322251.

It is not a weakly prime, because it can be changed into another prime (203312322253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101656161125 + 101656161126.

It is an arithmetic number, because the mean of its divisors is an integer number (101656161126).

Almost surely, 2^203312322251 is an apocalyptic number.

203312322251 is a deficient number, since it is larger than the sum of its proper divisors (1).

203312322251 is an equidigital number, since it uses as much as digits as its factorization.

203312322251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 203312322251 its reverse (152223213302), we get a palindrome (355535535553).

The spelling of 203312322251 in words is "two hundred three billion, three hundred twelve million, three hundred twenty-two thousand, two hundred fifty-one".