82136631 has 4 divisors (see below), whose sum is σ = 109515512. Its totient is φ = 54757752.

The previous prime is 82136609. The next prime is 82136647. The reversal of 82136631 is 13663128.

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

It is not a de Polignac number, because 82136631 - 2⁵ = 82136599 is a prime.

It is a super-2 number, since 2×82136631² = 13492852304060322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82134631) 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, 13689436 + ... + 13689441.

It is an arithmetic number, because the mean of its divisors is an integer number (27378878).

Almost surely, 2^82136631 is an apocalyptic number.

82136631 is a deficient number, since it is larger than the sum of its proper divisors (27378881).

82136631 is a wasteful number, since it uses less digits than its factorization.

82136631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27378880.

The product of its digits is 5184, while the sum is 30.

The square root of 82136631 is about 9062.9261830824. The cubic root of 82136631 is about 434.6893117753.

Adding to 82136631 its reverse (13663128), we get a palindrome (95799759).

The spelling of 82136631 in words is "eighty-two million, one hundred thirty-six thousand, six hundred thirty-one".