203931157 has 2 divisors, whose sum is σ = 203931158. Its totient is φ = 203931156.

The previous prime is 203931149. The next prime is 203931163. The reversal of 203931157 is 751139302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179586801 + 24344356 = 13401^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 203931157 - 2³ = 203931149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203931127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101965578 + 101965579.

It is an arithmetic number, because the mean of its divisors is an integer number (101965579).

Almost surely, 2^203931157 is an apocalyptic number.

It is an amenable number.

203931157 is a deficient number, since it is larger than the sum of its proper divisors (1).

203931157 is an equidigital number, since it uses as much as digits as its factorization.

203931157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 203931157 is about 14280.4466666838. The cubic root of 203931157 is about 588.6103048614.

The spelling of 203931157 in words is "two hundred three million, nine hundred thirty-one thousand, one hundred fifty-seven".