812066531 has 2 divisors, whose sum is σ = 812066532. Its totient is φ = 812066530.

The previous prime is 812066473. The next prime is 812066537. The reversal of 812066531 is 135660218.

It is a happy number.

812066531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812066531 is a prime.

It is a super-2 number, since 2×812066531² = 1318904101540747922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (812066537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406033265 + 406033266.

It is an arithmetic number, because the mean of its divisors is an integer number (406033266).

Almost surely, 2^812066531 is an apocalyptic number.

812066531 is a deficient number, since it is larger than the sum of its proper divisors (1).

812066531 is an equidigital number, since it uses as much as digits as its factorization.

812066531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 812066531 is about 28496.7810638325. The cubic root of 812066531 is about 932.9618183648.

The spelling of 812066531 in words is "eight hundred twelve million, sixty-six thousand, five hundred thirty-one".