816437215 has 24 divisors (see below), whose sum is σ = 1080268560. Its totient is φ = 591909120.

The previous prime is 816437197. The next prime is 816437267. The reversal of 816437215 is 512734618.

It is not a de Polignac number, because 816437215 - 2²⁷ = 682219487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207991 + ... + 211879.

It is an arithmetic number, because the mean of its divisors is an integer number (45011190).

Almost surely, 2^816437215 is an apocalyptic number.

816437215 is a deficient number, since it is larger than the sum of its proper divisors (263831345).

816437215 is a wasteful number, since it uses less digits than its factorization.

816437215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263 (or 4252 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 816437215 is about 28573.3654825609. The cubic root of 816437215 is about 934.6326122940.

The spelling of 816437215 in words is "eight hundred sixteen million, four hundred thirty-seven thousand, two hundred fifteen".