812142230 has 16 divisors (see below), whose sum is σ = 1501366320. Its totient is φ = 316076832.

The previous prime is 812142223. The next prime is 812142239. The reversal of 812142230 is 32241218.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 812142196 and 812142205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812142239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097120 + ... + 1097859.

It is an arithmetic number, because the mean of its divisors is an integer number (93835395).

Almost surely, 2^812142230 is an apocalyptic number.

812142230 is a deficient number, since it is larger than the sum of its proper divisors (689224090).

812142230 is a wasteful number, since it uses less digits than its factorization.

812142230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195023.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 812142230 is about 28498.1092355265. The cubic root of 812142230 is about 932.9908069922.

Adding to 812142230 its reverse (32241218), we get a palindrome (844383448).

The spelling of 812142230 in words is "eight hundred twelve million, one hundred forty-two thousand, two hundred thirty".