206155423 has 2 divisors, whose sum is σ = 206155424. Its totient is φ = 206155422.

The previous prime is 206155393. The next prime is 206155429. The reversal of 206155423 is 324551602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206155423 - 2²⁵ = 172600991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206155391 and 206155400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206155429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103077711 + 103077712.

It is an arithmetic number, because the mean of its divisors is an integer number (103077712).

Almost surely, 2^206155423 is an apocalyptic number.

206155423 is a deficient number, since it is larger than the sum of its proper divisors (1).

206155423 is an equidigital number, since it uses as much as digits as its factorization.

206155423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 206155423 is about 14358.1134902883. The cubic root of 206155423 is about 590.7425516067.

The spelling of 206155423 in words is "two hundred six million, one hundred fifty-five thousand, four hundred twenty-three".