81823030351 has 2 divisors, whose sum is σ = 81823030352. Its totient is φ = 81823030350.

The previous prime is 81823030307. The next prime is 81823030363. The reversal of 81823030351 is 15303032818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81823030351 - 2⁹ = 81823029839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81823030151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40911515175 + 40911515176.

It is an arithmetic number, because the mean of its divisors is an integer number (40911515176).

Almost surely, 2^81823030351 is an apocalyptic number.

81823030351 is a deficient number, since it is larger than the sum of its proper divisors (1).

81823030351 is an equidigital number, since it uses as much as digits as its factorization.

81823030351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 81823030351 in words is "eighty-one billion, eight hundred twenty-three million, thirty thousand, three hundred fifty-one".