10220813 has 4 divisors (see below), whose sum is σ = 10257468. Its totient is φ = 10184160.

The previous prime is 10220807. The next prime is 10220827. The reversal of 10220813 is 31802201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6901129 + 3319684 = 2627^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 10220813 - 2⁴ = 10220797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10220791 and 10220800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10220863) 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, 17906 + ... + 18467.

It is an arithmetic number, because the mean of its divisors is an integer number (2564367).

Almost surely, 2^10220813 is an apocalyptic number.

It is an amenable number.

10220813 is a deficient number, since it is larger than the sum of its proper divisors (36655).

10220813 is an equidigital number, since it uses as much as digits as its factorization.

10220813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36654.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 10220813 is about 3197.0006255864. Note that the first 3 decimals coincide. The cubic root of 10220813 is about 217.0176955421.

The spelling of 10220813 in words is "ten million, two hundred twenty thousand, eight hundred thirteen".