811530630231 has 16 divisors (see below), whose sum is σ = 1084746875520. Its totient is φ = 539669017440.

The previous prime is 811530630223. The next prime is 811530630233. The reversal of 811530630231 is 132036035118.

It is not a de Polignac number, because 811530630231 - 2³ = 811530630223 is a prime.

It is a super-2 number, since 2×811530630231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811530630192 and 811530630201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811530630233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817496 + ... + 2219538.

It is an arithmetic number, because the mean of its divisors is an integer number (67796679720).

Almost surely, 2^811530630231 is an apocalyptic number.

811530630231 is a deficient number, since it is larger than the sum of its proper divisors (273216245289).

811530630231 is a wasteful number, since it uses less digits than its factorization.

811530630231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403726.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 811530630231 its reverse (132036035118), we get a palindrome (943566665349).

The spelling of 811530630231 in words is "eight hundred eleven billion, five hundred thirty million, six hundred thirty thousand, two hundred thirty-one".