816995229 has 12 divisors (see below), whose sum is σ = 1096708704. Its totient is φ = 540978064.

The previous prime is 816995189. The next prime is 816995273. The reversal of 816995229 is 922599618.

It is not a de Polignac number, because 816995229 - 2⁸ = 816994973 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816995629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639139 + ... + 640415.

It is an arithmetic number, because the mean of its divisors is an integer number (91392392).

Almost surely, 2^816995229 is an apocalyptic number.

It is an amenable number.

816995229 is a deficient number, since it is larger than the sum of its proper divisors (279713475).

816995229 is an equidigital number, since it uses as much as digits as its factorization.

816995229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724 (or 1447 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 816995229 is about 28583.1283977104. The cubic root of 816995229 is about 934.8454963137.

The spelling of 816995229 in words is "eight hundred sixteen million, nine hundred ninety-five thousand, two hundred twenty-nine".