820034231 has 2 divisors, whose sum is σ = 820034232. Its totient is φ = 820034230.

The previous prime is 820034183. The next prime is 820034233. The reversal of 820034231 is 132430028.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820034231 is a prime.

It is a super-2 number, since 2×820034231² = 1344912280023522722, which contains 22 as substring.

Together with 820034233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 820034197 and 820034206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820034233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410017115 + 410017116.

It is an arithmetic number, because the mean of its divisors is an integer number (410017116).

Almost surely, 2^820034231 is an apocalyptic number.

820034231 is a deficient number, since it is larger than the sum of its proper divisors (1).

820034231 is an equidigital number, since it uses as much as digits as its factorization.

820034231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 820034231 is about 28636.2398195014. The cubic root of 820034231 is about 936.0031864740.

Adding to 820034231 its reverse (132430028), we get a palindrome (952464259).

The spelling of 820034231 in words is "eight hundred twenty million, thirty-four thousand, two hundred thirty-one".