38313281 has 2 divisors, whose sum is σ = 38313282. Its totient is φ = 38313280.

The previous prime is 38313269. The next prime is 38313299. The reversal of 38313281 is 18231383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32672656 + 5640625 = 5716^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 38313281 - 2²² = 34118977 is a prime.

It is a super-2 number, since 2×38313281² = 2935815001969922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_2337068 and since 38313281 and 2337068 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (38313251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19156640 + 19156641.

It is an arithmetic number, because the mean of its divisors is an integer number (19156641).

Almost surely, 2^38313281 is an apocalyptic number.

It is an amenable number.

38313281 is a deficient number, since it is larger than the sum of its proper divisors (1).

38313281 is an equidigital number, since it uses as much as digits as its factorization.

38313281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 38313281 is about 6189.7722898343. The cubic root of 38313281 is about 337.1189106858.

The spelling of 38313281 in words is "thirty-eight million, three hundred thirteen thousand, two hundred eighty-one".