816403051 has 2 divisors, whose sum is σ = 816403052. Its totient is φ = 816403050.

The previous prime is 816403037. The next prime is 816403079. The reversal of 816403051 is 150304618.

It is an a-pointer prime, because the next prime (816403079) can be obtained adding 816403051 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816403051 - 2⁹ = 816402539 is a prime.

It is not a weakly prime, because it can be changed into another prime (816403151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408201525 + 408201526.

It is an arithmetic number, because the mean of its divisors is an integer number (408201526).

Almost surely, 2^816403051 is an apocalyptic number.

816403051 is a deficient number, since it is larger than the sum of its proper divisors (1).

816403051 is an equidigital number, since it uses as much as digits as its factorization.

816403051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 816403051 is about 28572.7676468346. The cubic root of 816403051 is about 934.6195754745.

Adding to 816403051 its reverse (150304618), we get a palindrome (966707669).

The spelling of 816403051 in words is "eight hundred sixteen million, four hundred three thousand, fifty-one".