82870161 has 32 divisors (see below), whose sum is σ = 126627840. Its totient is φ = 47745600.

The previous prime is 82870091. The next prime is 82870163. The reversal of 82870161 is 16107828.

It is a happy number.

It is not a de Polignac number, because 82870161 - 2¹³ = 82861969 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (82870163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59671 + ... + 61043.

It is an arithmetic number, because the mean of its divisors is an integer number (3957120).

Almost surely, 2^82870161 is an apocalyptic number.

It is an amenable number.

82870161 is a deficient number, since it is larger than the sum of its proper divisors (43757679).

82870161 is a wasteful number, since it uses less digits than its factorization.

82870161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 82870161 is about 9103.3049493028. The cubic root of 82870161 is about 435.9794918530.

Adding to 82870161 its reverse (16107828), we get a palindrome (98977989).

The spelling of 82870161 in words is "eighty-two million, eight hundred seventy thousand, one hundred sixty-one".