206632151 has 4 divisors (see below), whose sum is σ = 225416904. Its totient is φ = 187847400.

The previous prime is 206632133. The next prime is 206632159. The reversal of 206632151 is 151236602.

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-206632151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206632151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206632159) 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, 9392360 + ... + 9392381.

It is an arithmetic number, because the mean of its divisors is an integer number (56354226).

Almost surely, 2^206632151 is an apocalyptic number.

206632151 is a deficient number, since it is larger than the sum of its proper divisors (18784753).

206632151 is a wasteful number, since it uses less digits than its factorization.

206632151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784752.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 206632151 is about 14374.7052491521. The cubic root of 206632151 is about 591.1975589787.

Adding to 206632151 its reverse (151236602), we get a palindrome (357868753).

The spelling of 206632151 in words is "two hundred six million, six hundred thirty-two thousand, one hundred fifty-one".