56642231 has 2 divisors, whose sum is σ = 56642232. Its totient is φ = 56642230.

The previous prime is 56642207. The next prime is 56642237. The reversal of 56642231 is 13224665.

56642231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56642231 - 2¹⁴ = 56625847 is a prime.

It is a super-2 number, since 2×56642231² = 6416684665314722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56642194 and 56642203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56642237) 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 as a sum of consecutive naturals, namely, 28321115 + 28321116.

It is an arithmetic number, because the mean of its divisors is an integer number (28321116).

Almost surely, 2^56642231 is an apocalyptic number.

56642231 is a deficient number, since it is larger than the sum of its proper divisors (1).

56642231 is an equidigital number, since it uses as much as digits as its factorization.

56642231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 56642231 is about 7526.1033078214. The cubic root of 56642231 is about 384.0432328892.

Adding to 56642231 its reverse (13224665), we get a palindrome (69866896).

The spelling of 56642231 in words is "fifty-six million, six hundred forty-two thousand, two hundred thirty-one".