10181965 has 4 divisors (see below), whose sum is σ = 12218364. Its totient is φ = 8145568.

The previous prime is 10181959. The next prime is 10181999. The reversal of 10181965 is 56918101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56918101 = 1151 ⋅49451.

It can be written as a sum of positive squares in 2 ways, for example, as 8099716 + 2082249 = 2846^2 + 1443^2 .

It is a cyclic number.

It is not a de Polignac number, because 10181965 - 2⁵ = 10181933 is a prime.

It is a super-2 number, since 2×10181965² = 207344822522450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018192 + ... + 1018201.

It is an arithmetic number, because the mean of its divisors is an integer number (3054591).

Almost surely, 2^10181965 is an apocalyptic number.

It is an amenable number.

10181965 is a deficient number, since it is larger than the sum of its proper divisors (2036399).

10181965 is an equidigital number, since it uses as much as digits as its factorization.

10181965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036398.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 10181965 is about 3190.9191465783. The cubic root of 10181965 is about 216.7423943050.

The spelling of 10181965 in words is "ten million, one hundred eighty-one thousand, nine hundred sixty-five".