210238157 has 2 divisors, whose sum is σ = 210238158. Its totient is φ = 210238156.

The previous prime is 210238151. The next prime is 210238199. The reversal of 210238157 is 751832012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208109476 + 2128681 = 14426^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 210238157 - 2⁸ = 210237901 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 (210238151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105119078 + 105119079.

It is an arithmetic number, because the mean of its divisors is an integer number (105119079).

Almost surely, 2^210238157 is an apocalyptic number.

It is an amenable number.

210238157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210238157 is an equidigital number, since it uses as much as digits as its factorization.

210238157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 210238157 is about 14499.5916149387. The cubic root of 210238157 is about 594.6168066775.

The spelling of 210238157 in words is "two hundred ten million, two hundred thirty-eight thousand, one hundred fifty-seven".