38512381 has 2 divisors, whose sum is σ = 38512382. Its totient is φ = 38512380.

The previous prime is 38512351. The next prime is 38512393. The reversal of 38512381 is 18321583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36060025 + 2452356 = 6005^2 + 1566^2 .

It is a cyclic number.

It is not a de Polignac number, because 38512381 - 2⁵ = 38512349 is a prime.

It is a super-2 number, since 2×38512381² = 2966406980578322, which contains 22 as substring.

It is equal to p_2348464 and since 38512381 and 2348464 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38512351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19256190 + 19256191.

It is an arithmetic number, because the mean of its divisors is an integer number (19256191).

Almost surely, 2^38512381 is an apocalyptic number.

It is an amenable number.

38512381 is a deficient number, since it is larger than the sum of its proper divisors (1).

38512381 is an equidigital number, since it uses as much as digits as its factorization.

38512381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 38512381 is about 6205.8344322097. The cubic root of 38512381 is about 337.7018629612.

The spelling of 38512381 in words is "thirty-eight million, five hundred twelve thousand, three hundred eighty-one".