61632321 has 16 divisors (see below), whose sum is σ = 83809728. Its totient is φ = 40280000.

The previous prime is 61632313. The next prime is 61632323. The reversal of 61632321 is 12323616.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61632321 - 2³ = 61632313 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61632291 and 61632300.

It is not an unprimeable number, because it can be changed into a prime (61632323) 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, 31471 + ... + 33371.

It is an arithmetic number, because the mean of its divisors is an integer number (5238108).

Almost surely, 2^61632321 is an apocalyptic number.

It is an amenable number.

61632321 is a deficient number, since it is larger than the sum of its proper divisors (22177407).

61632321 is a wasteful number, since it uses less digits than its factorization.

61632321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its digits is 1296, while the sum is 24.

The square root of 61632321 is about 7850.6255164796. The cubic root of 61632321 is about 395.0052255891.

Adding to 61632321 its reverse (12323616), we get a palindrome (73955937).

The spelling of 61632321 in words is "sixty-one million, six hundred thirty-two thousand, three hundred twenty-one".