816206051 has 4 divisors (see below), whose sum is σ = 838265712. Its totient is φ = 794146392.

The previous prime is 816206021. The next prime is 816206063. The reversal of 816206051 is 150602618.

It is a happy number.

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

It is not a de Polignac number, because 816206051 - 2¹⁸ = 815943907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816206021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11029775 + ... + 11029848.

It is an arithmetic number, because the mean of its divisors is an integer number (209566428).

Almost surely, 2^816206051 is an apocalyptic number.

816206051 is a deficient number, since it is larger than the sum of its proper divisors (22059661).

816206051 is a wasteful number, since it uses less digits than its factorization.

816206051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22059660.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 816206051 is about 28569.3201004154. The cubic root of 816206051 is about 934.5443941174.

Adding to 816206051 its reverse (150602618), we get a palindrome (966808669).

The spelling of 816206051 in words is "eight hundred sixteen million, two hundred six thousand, fifty-one".