10517981 has 8 divisors (see below), whose sum is σ = 11020800. Its totient is φ = 10024560.

The previous prime is 10517977. The next prime is 10517987. The reversal of 10517981 is 18971501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10517981 - 2² = 10517977 is a prime.

It is a super-2 number, since 2×10517981² = 221255848632722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10517987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5 + ... + 4586.

It is an arithmetic number, because the mean of its divisors is an integer number (1377600).

Almost surely, 2^10517981 is an apocalyptic number.

It is an amenable number.

10517981 is a deficient number, since it is larger than the sum of its proper divisors (502819).

10517981 is an equidigital number, since it uses as much as digits as its factorization.

10517981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 10517981 is about 3243.1436909271. The cubic root of 10517981 is about 219.1008827483.

The spelling of 10517981 in words is "ten million, five hundred seventeen thousand, nine hundred eighty-one".