56326421 has 2 divisors, whose sum is σ = 56326422. Its totient is φ = 56326420.

The previous prime is 56326397. The next prime is 56326441. The reversal of 56326421 is 12462365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 286225 = 7486^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 56326421 - 2¹⁰ = 56325397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56326441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28163210 + 28163211.

It is an arithmetic number, because the mean of its divisors is an integer number (28163211).

Almost surely, 2^56326421 is an apocalyptic number.

It is an amenable number.

56326421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56326421 is an equidigital number, since it uses as much as digits as its factorization.

56326421 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 56326421 is about 7505.0930040873. The cubic root of 56326421 is about 383.3281551075.

Adding to 56326421 its reverse (12462365), we get a palindrome (68788786).

The spelling of 56326421 in words is "fifty-six million, three hundred twenty-six thousand, four hundred twenty-one".