203112553253161 has 2 divisors, whose sum is σ = 203112553253162. Its totient is φ = 203112553253160.

The previous prime is 203112553252997. The next prime is 203112553253173. The reversal of 203112553253161 is 161352355211302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130756366265625 + 72356186987536 = 11434875^2 + 8506244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203112553253161 is a prime.

It is not a weakly prime, because it can be changed into another prime (203112553253191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556276626580 + 101556276626581.

It is an arithmetic number, because the mean of its divisors is an integer number (101556276626581).

Almost surely, 2^{203112553253161} is an apocalyptic number.

It is an amenable number.

203112553253161 is a deficient number, since it is larger than the sum of its proper divisors (1).

203112553253161 is an equidigital number, since it uses as much as digits as its factorization.

203112553253161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 203112553253161 in words is "two hundred three trillion, one hundred twelve billion, five hundred fifty-three million, two hundred fifty-three thousand, one hundred sixty-one".