76344221 has 16 divisors (see below), whose sum is σ = 80498880. Its totient is φ = 72334080.

The previous prime is 76344197. The next prime is 76344239. The reversal of 76344221 is 12244367.

It is a cyclic number.

It is not a de Polignac number, because 76344221 - 2¹⁴ = 76327837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76344421) 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, 316661 + ... + 316901.

It is an arithmetic number, because the mean of its divisors is an integer number (5031180).

Almost surely, 2^76344221 is an apocalyptic number.

It is an amenable number.

76344221 is a deficient number, since it is larger than the sum of its proper divisors (4154659).

76344221 is a wasteful number, since it uses less digits than its factorization.

With its successor (76344222) it forms an eRAP, since the sums of their prime factors are consecutive (476 and 477).

76344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its digits is 8064, while the sum is 29.

The square root of 76344221 is about 8737.5180114264. The cubic root of 76344221 is about 424.2208951184.

Adding to 76344221 its reverse (12244367), we get a palindrome (88588588).

The spelling of 76344221 in words is "seventy-six million, three hundred forty-four thousand, two hundred twenty-one".