82650381 has 24 divisors (see below), whose sum is σ = 122828160. Its totient is φ = 49389120.

The previous prime is 82650367. The next prime is 82650497. The reversal of 82650381 is 18305628.

It is a happy number.

It is not a de Polignac number, because 82650381 - 2⁵ = 82650349 is a prime.

It is a super-2 number, since 2×82650381² = 13662170958890322, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82640381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24940 + ... + 28058.

It is an arithmetic number, because the mean of its divisors is an integer number (5117840).

Almost surely, 2^82650381 is an apocalyptic number.

It is an amenable number.

82650381 is a deficient number, since it is larger than the sum of its proper divisors (40177779).

82650381 is a wasteful number, since it uses less digits than its factorization.

82650381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217 (or 3206 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 82650381 is about 9091.2254949484. The cubic root of 82650381 is about 435.5937301414.

The spelling of 82650381 in words is "eighty-two million, six hundred fifty thousand, three hundred eighty-one".