76843221 has 48 divisors (see below), whose sum is σ = 130233600. Its totient is φ = 39940992.

The previous prime is 76843189. The next prime is 76843331. The reversal of 76843221 is 12234867.

It is not a de Polignac number, because 76843221 - 2⁵ = 76843189 is a prime.

It is a super-2 number, since 2×76843221² = 11809761227309682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76841221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150715 + ... + 151223.

It is an arithmetic number, because the mean of its divisors is an integer number (2713200).

Almost surely, 2^76843221 is an apocalyptic number.

It is an amenable number.

76843221 is a deficient number, since it is larger than the sum of its proper divisors (53390379).

76843221 is a wasteful number, since it uses less digits than its factorization.

76843221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 611 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 76843221 is about 8766.0265228894. The cubic root of 76843221 is about 425.1431508550.

The spelling of 76843221 in words is "seventy-six million, eight hundred forty-three thousand, two hundred twenty-one".