82124191 has 8 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 78456312.

The previous prime is 82124183. The next prime is 82124227. The reversal of 82124191 is 19142128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82124191 - 2³ = 82124183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82124131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22770 + ... + 26128.

It is an arithmetic number, because the mean of its divisors is an integer number (10725120).

Almost surely, 2^82124191 is an apocalyptic number.

82124191 is a deficient number, since it is larger than the sum of its proper divisors (3676769).

82124191 is a wasteful number, since it uses less digits than its factorization.

82124191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445.

The product of its digits is 1152, while the sum is 28.

The square root of 82124191 is about 9062.2398445417. The cubic root of 82124191 is about 434.6673653835.

It can be divided in two parts, 8212 and 4191, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 82124191 in words is "eighty-two million, one hundred twenty-four thousand, one hundred ninety-one".