38681231 has 2 divisors, whose sum is σ = 38681232. Its totient is φ = 38681230.

The previous prime is 38681221. The next prime is 38681233. The reversal of 38681231 is 13218683.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38681231 is a prime.

It is a super-2 number, since 2×38681231² = 2992475263350722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 38681233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38681233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19340615 + 19340616.

It is an arithmetic number, because the mean of its divisors is an integer number (19340616).

Almost surely, 2^38681231 is an apocalyptic number.

38681231 is a deficient number, since it is larger than the sum of its proper divisors (1).

38681231 is an equidigital number, since it uses as much as digits as its factorization.

38681231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 38681231 is about 6219.4236871273. The cubic root of 38681231 is about 338.1946727023.

The spelling of 38681231 in words is "thirty-eight million, six hundred eighty-one thousand, two hundred thirty-one".