82108257 has 32 divisors (see below), whose sum is σ = 138753024. Its totient is φ = 41947200.

The previous prime is 82108237. The next prime is 82108267. The reversal of 82108257 is 75280128.

It is not a de Polignac number, because 82108257 - 2⁷ = 82108129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (82108207) 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, 11178 + ... + 17004.

It is an arithmetic number, because the mean of its divisors is an integer number (4336032).

Almost surely, 2^82108257 is an apocalyptic number.

It is an amenable number.

82108257 is a deficient number, since it is larger than the sum of its proper divisors (56644767).

82108257 is a wasteful number, since it uses less digits than its factorization.

82108257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 82108257 is about 9061.3606594153. The cubic root of 82108257 is about 434.6392517111.

The spelling of 82108257 in words is "eighty-two million, one hundred eight thousand, two hundred fifty-seven".