82154505 has 32 divisors (see below), whose sum is σ = 139781376. Its totient is φ = 41110784.

The previous prime is 82154497. The next prime is 82154507. The reversal of 82154505 is 50545128.

It is a cyclic number.

It is not a de Polignac number, because 82154505 - 2³ = 82154497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82154507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16039 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (4368168).

Almost surely, 2^82154505 is an apocalyptic number.

It is an amenable number.

82154505 is a deficient number, since it is larger than the sum of its proper divisors (57626871).

82154505 is a wasteful number, since it uses less digits than its factorization.

82154505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 82154505 is about 9063.9122347913. The cubic root of 82154505 is about 434.7208408391.

It can be divided in two parts, 8215 and 4505, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 82154505 in words is "eighty-two million, one hundred fifty-four thousand, five hundred five".