10556321 has 2 divisors, whose sum is σ = 10556322. Its totient is φ = 10556320.

The previous prime is 10556317. The next prime is 10556363. The reversal of 10556321 is 12365501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 2496400 = 2839^2 + 1580^2 .

It is an emirp because it is prime and its reverse (12365501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10556321 - 2² = 10556317 is a prime.

It is a super-2 number, since 2×10556321² = 222871826110082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10516321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278160 + 5278161.

It is an arithmetic number, because the mean of its divisors is an integer number (5278161).

Almost surely, 2^10556321 is an apocalyptic number.

It is an amenable number.

10556321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10556321 is an equidigital number, since it uses as much as digits as its factorization.

10556321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 10556321 is about 3249.0492455486. The cubic root of 10556321 is about 219.3667811035.

The spelling of 10556321 in words is "ten million, five hundred fifty-six thousand, three hundred twenty-one".