82159001 has 4 divisors (see below), whose sum is σ = 84992100. Its totient is φ = 79325904.

The previous prime is 82158991. The next prime is 82159019. The reversal of 82159001 is 10095128.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20693401 + 61465600 = 4549^2 + 7840^2 .

It is not a de Polignac number, because 82159001 - 2²⁶ = 15050137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82152001) 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, 1416506 + ... + 1416563.

It is an arithmetic number, because the mean of its divisors is an integer number (21248025).

Almost surely, 2^82159001 is an apocalyptic number.

It is an amenable number.

82159001 is a deficient number, since it is larger than the sum of its proper divisors (2833099).

82159001 is a wasteful number, since it uses less digits than its factorization.

82159001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833098.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 82159001 is about 9064.1602479215. The cubic root of 82159001 is about 434.7287708941.

The spelling of 82159001 in words is "eighty-two million, one hundred fifty-nine thousand, one".