82276221631 has 4 divisors (see below), whose sum is σ = 87115999392. Its totient is φ = 77436443872.

The previous prime is 82276221613. The next prime is 82276221661. The reversal of 82276221631 is 13612267228.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82276221631 is a prime.

It is a super-2 number, since 2×82276221631² (a number of 23 digits) 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 (82276221611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2419888855 + ... + 2419888888.

It is an arithmetic number, because the mean of its divisors is an integer number (21778999848).

Almost surely, 2^82276221631 is an apocalyptic number.

82276221631 is a deficient number, since it is larger than the sum of its proper divisors (4839777761).

82276221631 is a wasteful number, since it uses less digits than its factorization.

82276221631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839777760.

The product of its digits is 96768, while the sum is 40.

Adding to 82276221631 its reverse (13612267228), we get a palindrome (95888488859).

The spelling of 82276221631 in words is "eighty-two billion, two hundred seventy-six million, two hundred twenty-one thousand, six hundred thirty-one".