38161281 has 4 divisors (see below), whose sum is σ = 50881712. Its totient is φ = 25440852.

The previous prime is 38161267. The next prime is 38161297. The reversal of 38161281 is 18216183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-38161281 is a prime.

It is a super-2 number, since 2×38161281² = 2912566735121922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38161231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6360211 + ... + 6360216.

It is an arithmetic number, because the mean of its divisors is an integer number (12720428).

Almost surely, 2^38161281 is an apocalyptic number.

It is an amenable number.

38161281 is a deficient number, since it is larger than the sum of its proper divisors (12720431).

38161281 is a wasteful number, since it uses less digits than its factorization.

38161281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720430.

The product of its digits is 2304, while the sum is 30.

The square root of 38161281 is about 6177.4817684879. The cubic root of 38161281 is about 336.6725033571.

The spelling of 38161281 in words is "thirty-eight million, one hundred sixty-one thousand, two hundred eighty-one".