82169051 has 2 divisors, whose sum is σ = 82169052. Its totient is φ = 82169050.

The previous prime is 82169047. The next prime is 82169071. The reversal of 82169051 is 15096128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82169051 - 2² = 82169047 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 82168999 and 82169017.

It is not a weakly prime, because it can be changed into another prime (82169011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41084525 + 41084526.

It is an arithmetic number, because the mean of its divisors is an integer number (41084526).

Almost surely, 2^82169051 is an apocalyptic number.

82169051 is a deficient number, since it is larger than the sum of its proper divisors (1).

82169051 is an equidigital number, since it uses as much as digits as its factorization.

82169051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 82169051 is about 9064.7146121651. The cubic root of 82169051 is about 434.7464960610.

The spelling of 82169051 in words is "eighty-two million, one hundred sixty-nine thousand, fifty-one".