206563151 has 4 divisors (see below), whose sum is σ = 206643552. Its totient is φ = 206482752.

The previous prime is 206563127. The next prime is 206563153. The reversal of 206563151 is 151365602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206563151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206563153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36215 + ... + 41528.

It is an arithmetic number, because the mean of its divisors is an integer number (51660888).

Almost surely, 2^206563151 is an apocalyptic number.

206563151 is a deficient number, since it is larger than the sum of its proper divisors (80401).

206563151 is an equidigital number, since it uses as much as digits as its factorization.

206563151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80400.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 206563151 is about 14372.3049995469. The cubic root of 206563151 is about 591.1317460953.

The spelling of 206563151 in words is "two hundred six million, five hundred sixty-three thousand, one hundred fifty-one".