816312250 has 72 divisors (see below), whose sum is σ = 1666717884. Its totient is φ = 299239200.

The previous prime is 816312247. The next prime is 816312281. The reversal of 816312250 is 52213618.

It can be written as a sum of positive squares in 6 ways, for example, as 35724529 + 780587721 = 5977^2 + 27939^2 .

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 35 ways as a sum of consecutive naturals, for example, 5872681 + ... + 5872819.

Almost surely, 2^816312250 is an apocalyptic number.

816312250 is an abundant number, since it is smaller than the sum of its proper divisors (850405634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816312250 is a wasteful number, since it uses less digits than its factorization.

816312250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 159 counting only the distinct ones).

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

The square root of 816312250 is about 28571.1786596213. The cubic root of 816312250 is about 934.5849244777.

Adding to 816312250 its reverse (52213618), we get a palindrome (868525868).

The spelling of 816312250 in words is "eight hundred sixteen million, three hundred twelve thousand, two hundred fifty".