10516561 has 4 divisors (see below), whose sum is σ = 11472624. Its totient is φ = 9560500.

The previous prime is 10516537. The next prime is 10516567. The reversal of 10516561 is 16561501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16561501 = 11 ⋅1505591.

It is a cyclic number.

It is not a de Polignac number, because 10516561 - 2¹¹ = 10514513 is a prime.

It is a super-3 number, since 3×10516561³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10516567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478015 + ... + 478036.

It is an arithmetic number, because the mean of its divisors is an integer number (2868156).

Almost surely, 2^10516561 is an apocalyptic number.

10516561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10516561 is a deficient number, since it is larger than the sum of its proper divisors (956063).

10516561 is an equidigital number, since it uses as much as digits as its factorization.

10516561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956062.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 10516561 is about 3242.9247601509. The cubic root of 10516561 is about 219.0910222609.

The spelling of 10516561 in words is "ten million, five hundred sixteen thousand, five hundred sixty-one".