82019851 has 2 divisors, whose sum is σ = 82019852. Its totient is φ = 82019850.

The previous prime is 82019837. The next prime is 82019857. The reversal of 82019851 is 15891028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82019851 - 2⁷ = 82019723 is a prime.

It is not a weakly prime, because it can be changed into another prime (82019857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41009925 + 41009926.

It is an arithmetic number, because the mean of its divisors is an integer number (41009926).

Almost surely, 2^82019851 is an apocalyptic number.

82019851 is a deficient number, since it is larger than the sum of its proper divisors (1).

82019851 is an equidigital number, since it uses as much as digits as its factorization.

82019851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 82019851 is about 9056.4811599208. The cubic root of 82019851 is about 434.4832035946.

The spelling of 82019851 in words is "eighty-two million, nineteen thousand, eight hundred fifty-one".