13730231 has 2 divisors, whose sum is σ = 13730232. Its totient is φ = 13730230.

The previous prime is 13730207. The next prime is 13730261. The reversal of 13730231 is 13203731.

It is a happy number.

13730231 is digitally balanced in base 2 and base 3, because in such bases 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 13730231 - 2¹⁰ = 13729207 is a prime.

It is a super-2 number, since 2×13730231² = 377038486626722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13730261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6865115 + 6865116.

It is an arithmetic number, because the mean of its divisors is an integer number (6865116).

Almost surely, 2^13730231 is an apocalyptic number.

13730231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13730231 is an equidigital number, since it uses as much as digits as its factorization.

13730231 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 13730231 is about 3705.4326333102. The cubic root of 13730231 is about 239.4561237494.

Adding to 13730231 its reverse (13203731), we get a palindrome (26933962).

The spelling of 13730231 in words is "thirteen million, seven hundred thirty thousand, two hundred thirty-one".