56662321 has 4 divisors (see below), whose sum is σ = 56689444. Its totient is φ = 56635200.

The previous prime is 56662301. The next prime is 56662339. The reversal of 56662321 is 12326665.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16719921 + 39942400 = 4089^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 56662321 - 2⁹ = 56661809 is a prime.

It is a super-2 number, since 2×56662321² = 6421237242214082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56662301) 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 3 ways as a sum of consecutive naturals, for example, 10140 + ... + 14701.

It is an arithmetic number, because the mean of its divisors is an integer number (14172361).

Almost surely, 2^56662321 is an apocalyptic number.

It is an amenable number.

56662321 is a deficient number, since it is larger than the sum of its proper divisors (27123).

56662321 is a wasteful number, since it uses less digits than its factorization.

56662321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27122.

The product of its digits is 12960, while the sum is 31.

The square root of 56662321 is about 7527.4378775251. The cubic root of 56662321 is about 384.0886319752.

Adding to 56662321 its reverse (12326665), we get a palindrome (68988986).

The spelling of 56662321 in words is "fifty-six million, six hundred sixty-two thousand, three hundred twenty-one".