76232221 has 8 divisors (see below), whose sum is σ = 83221880. Its totient is φ = 69403392.

The previous prime is 76232159. The next prime is 76232227. The reversal of 76232221 is 12223267.

It can be written as a sum of positive squares in 4 ways, for example, as 12152196 + 64080025 = 3486^2 + 8005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76232221 - 2¹¹ = 76230173 is a prime.

It is a super-2 number, since 2×76232221² = 11622703037185682, 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 (76232227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39216 + ... + 41113.

It is an arithmetic number, because the mean of its divisors is an integer number (10402735).

Almost surely, 2^76232221 is an apocalyptic number.

It is an amenable number.

76232221 is a deficient number, since it is larger than the sum of its proper divisors (6989659).

76232221 is a wasteful number, since it uses less digits than its factorization.

76232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80415.

The product of its digits is 2016, while the sum is 25.

The square root of 76232221 is about 8731.1065163586. The cubic root of 76232221 is about 424.0133439642.

Adding to 76232221 its reverse (12223267), we get a palindrome (88455488).

The spelling of 76232221 in words is "seventy-six million, two hundred thirty-two thousand, two hundred twenty-one".