206157013 has 2 divisors, whose sum is σ = 206157014. Its totient is φ = 206157012.

The previous prime is 206157001. The next prime is 206157023. The reversal of 206157013 is 310751602.

206157013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204861969 + 1295044 = 14313^2 + 1138^2 .

It is a cyclic number.

It is not a de Polignac number, because 206157013 - 2¹³ = 206148821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206157023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103078506 + 103078507.

It is an arithmetic number, because the mean of its divisors is an integer number (103078507).

Almost surely, 2^206157013 is an apocalyptic number.

It is an amenable number.

206157013 is a deficient number, since it is larger than the sum of its proper divisors (1).

206157013 is an equidigital number, since it uses as much as digits as its factorization.

206157013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 206157013 is about 14358.1688595726. The cubic root of 206157013 is about 590.7440703285.

The spelling of 206157013 in words is "two hundred six million, one hundred fifty-seven thousand, thirteen".