82157107 has 8 divisors (see below), whose sum is σ = 87148656. Its totient is φ = 77183232.

The previous prime is 82157093. The next prime is 82157113. The reversal of 82157107 is 70175128.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82157107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82157407) 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, 5863 + ... + 14095.

It is an arithmetic number, because the mean of its divisors is an integer number (10893582).

Almost surely, 2^82157107 is an apocalyptic number.

82157107 is a deficient number, since it is larger than the sum of its proper divisors (4991549).

82157107 is a wasteful number, since it uses less digits than its factorization.

82157107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 82157107 is about 9064.0557699079. The cubic root of 82157107 is about 434.7254302879.

The spelling of 82157107 in words is "eighty-two million, one hundred fifty-seven thousand, one hundred seven".