38881481 has 2 divisors, whose sum is σ = 38881482. Its totient is φ = 38881480.

The previous prime is 38881463. The next prime is 38881483. The reversal of 38881481 is 18418883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38502025 + 379456 = 6205^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 38881481 - 2¹⁴ = 38865097 is a prime.

It is a super-2 number, since 2×38881481² = 3023539129506722, which contains 22 as substring.

Together with 38881483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38881483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19440740 + 19440741.

It is an arithmetic number, because the mean of its divisors is an integer number (19440741).

Almost surely, 2^38881481 is an apocalyptic number.

It is an amenable number.

38881481 is a deficient number, since it is larger than the sum of its proper divisors (1).

38881481 is an equidigital number, since it uses as much as digits as its factorization.

38881481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49152, while the sum is 41.

The square root of 38881481 is about 6235.5016638599. The cubic root of 38881481 is about 338.7772718066. Note that the first 3 decimals are identical.

The spelling of 38881481 in words is "thirty-eight million, eight hundred eighty-one thousand, four hundred eighty-one".