816234825 has 24 divisors (see below), whose sum is σ = 1542296128. Its totient is φ = 373135680.

The previous prime is 816234823. The next prime is 816234829. The reversal of 816234825 is 528432618.

It is not a de Polignac number, because 816234825 - 2¹ = 816234823 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (816234823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776842 + ... + 777891.

Almost surely, 2^816234825 is an apocalyptic number.

It is an amenable number.

816234825 is a deficient number, since it is larger than the sum of its proper divisors (726061303).

816234825 is a wasteful number, since it uses less digits than its factorization.

816234825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554753 (or 1554748 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 816234825 is about 28569.8236781398. The cubic root of 816234825 is about 934.5553759295. Note that the first 3 decimals are identical.

It can be divided in two parts, 816 and 234825, that added together give a triangular number (235641 = T₆₈₆).

The spelling of 816234825 in words is "eight hundred sixteen million, two hundred thirty-four thousand, eight hundred twenty-five".