13230731 has 2 divisors, whose sum is σ = 13230732. Its totient is φ = 13230730.

The previous prime is 13230689. The next prime is 13230787. The reversal of 13230731 is 13703231.

It is a happy number.

13230731 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 an emirp because it is prime and its reverse (13703231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13230731 - 2⁶ = 13230667 is a prime.

It is a super-2 number, since 2×13230731² = 350104485588722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13232731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615365 + 6615366.

It is an arithmetic number, because the mean of its divisors is an integer number (6615366).

Almost surely, 2^13230731 is an apocalyptic number.

13230731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13230731 is an equidigital number, since it uses as much as digits as its factorization.

13230731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 13230731 is about 3637.4071809463. The cubic root of 13230731 is about 236.5164108299.

Adding to 13230731 its reverse (13703231), we get a palindrome (26933962).

The spelling of 13230731 in words is "thirteen million, two hundred thirty thousand, seven hundred thirty-one".