82185747 has 16 divisors (see below), whose sum is σ = 125687040. Its totient is φ = 46793952.

The previous prime is 82185731. The next prime is 82185781. The reversal of 82185747 is 74758128.

It is not a de Polignac number, because 82185747 - 2⁴ = 82185731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82185699 and 82185708.

It is not an unprimeable number, because it can be changed into a prime (82185707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972 + ... + 12857.

It is an arithmetic number, because the mean of its divisors is an integer number (7855440).

Almost surely, 2^82185747 is an apocalyptic number.

82185747 is a deficient number, since it is larger than the sum of its proper divisors (43501293).

82185747 is a wasteful number, since it uses less digits than its factorization.

82185747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14122.

The product of its digits is 125440, while the sum is 42.

The square root of 82185747 is about 9065.6354989598. The cubic root of 82185747 is about 434.7759395715.

It can be divided in two parts, 821 and 85747, that added together give a palindrome (86568).

The spelling of 82185747 in words is "eighty-two million, one hundred eighty-five thousand, seven hundred forty-seven".