82175149 has 4 divisors (see below), whose sum is σ = 93914464. Its totient is φ = 70435836.

The previous prime is 82175143. The next prime is 82175153. The reversal of 82175149 is 94157128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82175149 - 2⁹ = 82174637 is a prime.

It is a super-2 number, since 2×82175149² = 13505510226344402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82175143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5869647 + ... + 5869660.

It is an arithmetic number, because the mean of its divisors is an integer number (23478616).

Almost surely, 2^82175149 is an apocalyptic number.

It is an amenable number.

82175149 is a deficient number, since it is larger than the sum of its proper divisors (11739315).

82175149 is a wasteful number, since it uses less digits than its factorization.

82175149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11739314.

The product of its digits is 20160, while the sum is 37.

The square root of 82175149 is about 9065.0509651077. The cubic root of 82175149 is about 434.7572503881.

It can be divided in two parts, 8217 and 5149, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 82175149 in words is "eighty-two million, one hundred seventy-five thousand, one hundred forty-nine".