82178265 has 32 divisors (see below), whose sum is σ = 142724736. Its totient is φ = 40135680.

The previous prime is 82178263. The next prime is 82178267. The reversal of 82178265 is 56287128.

It is an interprime number because it is at equal distance from previous prime (82178263) and next prime (82178267).

It is not a de Polignac number, because 82178265 - 2¹ = 82178263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (82178263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23937 + ... + 27153.

It is an arithmetic number, because the mean of its divisors is an integer number (4460148).

Almost surely, 2^82178265 is an apocalyptic number.

It is an amenable number.

82178265 is a deficient number, since it is larger than the sum of its proper divisors (60546471).

82178265 is a wasteful number, since it uses less digits than its factorization.

82178265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369.

The product of its digits is 53760, while the sum is 39.

The square root of 82178265 is about 9065.2228323412. Note that the first 3 decimals coincide. The cubic root of 82178265 is about 434.7627455063.

The spelling of 82178265 in words is "eighty-two million, one hundred seventy-eight thousand, two hundred sixty-five".