811023431 has 2 divisors, whose sum is σ = 811023432. Its totient is φ = 811023430.

The previous prime is 811023427. The next prime is 811023463. The reversal of 811023431 is 134320118.

811023431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811023431 - 2² = 811023427 is a prime.

It is a super-2 number, since 2×811023431² = 1315518011262023522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811023397 and 811023406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811022431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405511715 + 405511716.

It is an arithmetic number, because the mean of its divisors is an integer number (405511716).

Almost surely, 2^811023431 is an apocalyptic number.

811023431 is a deficient number, since it is larger than the sum of its proper divisors (1).

811023431 is an equidigital number, since it uses as much as digits as its factorization.

811023431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 811023431 is about 28478.4731156711. The cubic root of 811023431 is about 932.5621838466.

Adding to 811023431 its reverse (134320118), we get a palindrome (945343549).

The spelling of 811023431 in words is "eight hundred eleven million, twenty-three thousand, four hundred thirty-one".