10331561 has 2 divisors, whose sum is σ = 10331562. Its totient is φ = 10331560.

The previous prime is 10331557. The next prime is 10331579. The reversal of 10331561 is 16513301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 59536 = 3205^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 10331561 - 2² = 10331557 is a prime.

It is not a weakly prime, because it can be changed into another prime (10331521) 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, 5165780 + 5165781.

It is an arithmetic number, because the mean of its divisors is an integer number (5165781).

Almost surely, 2^10331561 is an apocalyptic number.

It is an amenable number.

10331561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10331561 is an equidigital number, since it uses as much as digits as its factorization.

10331561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 10331561 is about 3214.2745682346. The cubic root of 10331561 is about 217.7987158147.

Adding to 10331561 its reverse (16513301), we get a palindrome (26844862).

The spelling of 10331561 in words is "ten million, three hundred thirty-one thousand, five hundred sixty-one".