10631813 has 4 divisors (see below), whose sum is σ = 10642188. Its totient is φ = 10621440.

The previous prime is 10631809. The next prime is 10631821. The reversal of 10631813 is 31813601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31813601 = 3001 ⋅10601.

It can be written as a sum of positive squares in 2 ways, for example, as 9138529 + 1493284 = 3023^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 10631813 - 2² = 10631809 is a prime.

It is a super-2 number, since 2×10631813² = 226070895333938, 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 (10631113) 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, 3458 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (2660547).

Almost surely, 2^10631813 is an apocalyptic number.

It is an amenable number.

10631813 is a deficient number, since it is larger than the sum of its proper divisors (10375).

10631813 is an equidigital number, since it uses as much as digits as its factorization.

10631813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10631813 is about 3260.6461016185. The cubic root of 10631813 is about 219.8884627453. Note that the first 3 decimals are identical.

The spelling of 10631813 in words is "ten million, six hundred thirty-one thousand, eight hundred thirteen".