10555561 has 2 divisors, whose sum is σ = 10555562. Its totient is φ = 10555560.

The previous prime is 10555553. The next prime is 10555577. The reversal of 10555561 is 16555501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10361961 + 193600 = 3219^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 10555561 - 2³ = 10555553 is a prime.

It is a super-2 number, since 2×10555561² = 222839736049442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10553561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277780 + 5277781.

It is an arithmetic number, because the mean of its divisors is an integer number (5277781).

Almost surely, 2^10555561 is an apocalyptic number.

It is an amenable number.

10555561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10555561 is an equidigital number, since it uses as much as digits as its factorization.

10555561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 10555561 is about 3248.9322861519. The cubic root of 10555561 is about 219.3615165562.

The spelling of 10555561 in words is "ten million, five hundred fifty-five thousand, five hundred sixty-one".