13210531 has 2 divisors, whose sum is σ = 13210532. Its totient is φ = 13210530.

The previous prime is 13210523. The next prime is 13210543. The reversal of 13210531 is 13501231.

13210531 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 is a cyclic number.

It is not a de Polignac number, because 13210531 - 2³ = 13210523 is a prime.

It is a super-2 number, since 2×13210531² = 349036258603922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13210501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605265 + 6605266.

It is an arithmetic number, because the mean of its divisors is an integer number (6605266).

Almost surely, 2^13210531 is an apocalyptic number.

13210531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13210531 is an equidigital number, since it uses as much as digits as its factorization.

13210531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13210531 is about 3634.6294171483. The cubic root of 13210531 is about 236.3959824883.

Adding to 13210531 its reverse (13501231), we get a palindrome (26711762).

The spelling of 13210531 in words is "thirteen million, two hundred ten thousand, five hundred thirty-one".