206313157 has 2 divisors, whose sum is σ = 206313158. Its totient is φ = 206313156.

The previous prime is 206313137. The next prime is 206313169. The reversal of 206313157 is 751313602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176730436 + 29582721 = 13294^2 + 5439^2 .

It is a cyclic number.

It is not a de Polignac number, because 206313157 - 2¹¹ = 206311109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206313137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103156578 + 103156579.

It is an arithmetic number, because the mean of its divisors is an integer number (103156579).

Almost surely, 2^206313157 is an apocalyptic number.

It is an amenable number.

206313157 is a deficient number, since it is larger than the sum of its proper divisors (1).

206313157 is an equidigital number, since it uses as much as digits as its factorization.

206313157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 206313157 is about 14363.6052925441. The cubic root of 206313157 is about 590.8931765246.

Adding to 206313157 its reverse (751313602), we get a palindrome (957626759).

The spelling of 206313157 in words is "two hundred six million, three hundred thirteen thousand, one hundred fifty-seven".