13780231 has 2 divisors, whose sum is σ = 13780232. Its totient is φ = 13780230.

The previous prime is 13780229. The next prime is 13780279. The reversal of 13780231 is 13208731.

It is a weak prime.

It is an emirp because it is prime and its reverse (13208731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13780231 - 2¹ = 13780229 is a prime.

It is a super-2 number, since 2×13780231² = 379789532826722, which contains 22 as substring.

Together with 13780229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13780196 and 13780205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13780201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6890115 + 6890116.

It is an arithmetic number, because the mean of its divisors is an integer number (6890116).

Almost surely, 2^13780231 is an apocalyptic number.

13780231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13780231 is an equidigital number, since it uses as much as digits as its factorization.

13780231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13780231 is about 3712.1733526332. The cubic root of 13780231 is about 239.7464393828.

Adding to 13780231 its reverse (13208731), we get a palindrome (26988962).

The spelling of 13780231 in words is "thirteen million, seven hundred eighty thousand, two hundred thirty-one".