10531813 has 2 divisors, whose sum is σ = 10531814. Its totient is φ = 10531812.

The previous prime is 10531811. The next prime is 10531819. The reversal of 10531813 is 31813501.

10531813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 79524 = 3233^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 10531813 - 2¹ = 10531811 is a prime.

It is a super-2 number, since 2×10531813² = 221838170133938, which contains 22 as substring.

Together with 10531811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10531811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265906 + 5265907.

It is an arithmetic number, because the mean of its divisors is an integer number (5265907).

Almost surely, 2^10531813 is an apocalyptic number.

It is an amenable number.

10531813 is a deficient number, since it is larger than the sum of its proper divisors (1).

10531813 is an equidigital number, since it uses as much as digits as its factorization.

10531813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 10531813 is about 3245.2754890764. The cubic root of 10531813 is about 219.1968858336.

The spelling of 10531813 in words is "ten million, five hundred thirty-one thousand, eight hundred thirteen".