82195811 has 2 divisors, whose sum is σ = 82195812. Its totient is φ = 82195810.

The previous prime is 82195781. The next prime is 82195823. The reversal of 82195811 is 11859128.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82195811 is a prime.

It is not a weakly prime, because it can be changed into another prime (82195891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41097905 + 41097906.

It is an arithmetic number, because the mean of its divisors is an integer number (41097906).

Almost surely, 2^82195811 is an apocalyptic number.

82195811 is a deficient number, since it is larger than the sum of its proper divisors (1).

82195811 is an equidigital number, since it uses as much as digits as its factorization.

82195811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 35.

The square root of 82195811 is about 9066.1905450967. The cubic root of 82195811 is about 434.7936855782.

The spelling of 82195811 in words is "eighty-two million, one hundred ninety-five thousand, eight hundred eleven".